{"title":"C6 Corvette Heads","description":"","products":[{"product_id":"prc-227cc-cnc-ported-small-bore-3-9-4-cylinder-heads","title":"PRC 227cc CNC Ported Small Bore 3.9\"-4\" Cylinder Heads","description":"\u003cdiv\u003ePrecision Race Components all new cylinder head castings completed with 227cc runners. For stock cubic inch LS1\/LS2 applications requiring smaller chambers for extra compression\u003c\/div\u003e\n\u003cbr\u003e\u003ca href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e\u003cspan\u003e to SEE why we build better heads!\u003c\/span\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003eFeatures: \n\u003cul\u003e\n\u003cli\u003e227cc Fully CNC Ported Intake Runners\u003c\/li\u003e\n\u003cli\u003e84cc Fully CNC Ported Exhaust Runners\u003c\/li\u003e\n\u003cli\u003eSmall Bore Chambers For Increased Horsepower \u0026amp; Torque+ SPECIFICALLY DESIGNED FOR 3.9\"-4\" BORE APPLICATIONS\u003c\/li\u003e\n\u003cli\u003eTSP Spring Kit w\/ PAC Valve Springs Rated To .660\" Lift\u003c\/li\u003e\n\u003cli\u003e62cc CNC Machined Chambers(call for smaller CC)\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003e2.065\" Intake \/ 1.600\" Stainless Valves  ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!!***\u003c\/li\u003e\n\u003cli\u003eFactory Rocker Friendly!!*\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\nThe all new 227cc cylinder head is finally available for customers looking for the pinnacle of LS cathedral port performance.  Now is your chance to own the same cylinder head that currently holds the fastest stock bottom end heads \/ cam record!  The new 227cc port has been flow bench tested to flow over 320cfm \u0026amp; can support everything from smaller camshaft street engines all the way to all our race engines. This cylinder head is a combination of a max effort high flowing port combined with a smaller chamber designed for max power in stock cube applications. \u003cbr\u003e\u003cbr\u003eThis cylinder head was used on the Texas Speed 98 Camaro when it lowered the heads cam stock bottom end 1\/4 mile record to 9.66!!\u003cbr\u003e\u003cbr\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\nFlow Data:\u003cbr\u003e\u003cbr\u003e4.00\" Flow Plate - No Exhaust Pipe\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ctable frame=\"below\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLIFT\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eINTAKE FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEXHAUST FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .100\"  \u003c\/td\u003e\n\u003ctd\u003e68 CFM \u003c\/td\u003e\n\u003ctd\u003e56 CFM \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .200\"  \u003c\/td\u003e\n\u003ctd\u003e 145 CFM\u003c\/td\u003e\n\u003ctd\u003e 115 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .300\"  \u003c\/td\u003e\n\u003ctd\u003e 214 CFM\u003c\/td\u003e\n\u003ctd\u003e 167 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .400\"  \u003c\/td\u003e\n\u003ctd\u003e 261 CFM\u003c\/td\u003e\n\u003ctd\u003e 202 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .500\"  \u003c\/td\u003e\n\u003ctd\u003e 300 CFM\u003c\/td\u003e\n\u003ctd\u003e 219 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .600\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 322 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 238 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .650\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 330 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 236 CFM\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"No Springs \/ Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves","offer_id":31894037856355,"sku":"#199-PRC227-1","price":2399.99,"currency_code":"USD","in_stock":false},{"title":"No Springs \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894037889123,"sku":"#199-PRC227-4","price":2599.99,"currency_code":"USD","in_stock":false},{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves","offer_id":31894037921891,"sku":"#199-PRC227-5","price":2949.99,"currency_code":"USD","in_stock":false},{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894037954659,"sku":"#199-PRC227-8","price":2912.99,"currency_code":"USD","in_stock":true},{"title":"TSP .750\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves","offer_id":31894037987427,"sku":"#199-PRC227-9","price":2912.99,"currency_code":"USD","in_stock":true},{"title":"TSP .750\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894038020195,"sku":"#199-PRC227-12","price":2912.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/1163.png?v=1613333769"},{"product_id":"prc-237cc-cnc-ported-cylinder-heads","title":"PRC 237cc CNC Ported Cylinder Heads","description":"\u003cspan\u003ePrecision Race Components all new cylinder head castings completed with 237cc runners. For 370 cubic inch and larger applications with 4.00\"+ bore sizing.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003ca href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e\u003cspan\u003e to SEE why we build better heads!\u003c\/span\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cdiv\u003eFeatures: \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e237cc Fully CNC Ported Intake Runners\u003c\/li\u003e\n\u003cli\u003e84cc Fully CNC Ported Exhaust Runners\u003c\/li\u003e\n\u003cli\u003eTSP Dual Spring Kit w\/ PAC Springs Rated To .660\" Lift\u003c\/li\u003e\n\u003cli\u003e68cc CNC Machined Chambers(call for different chamber size)\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003e2.100\" Intake \/ 1.600\" Stainless Valves  \u003c\/li\u003e\n\u003cli\u003eFactory Rocker Friendly!!\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\nThe all new 237cc cylinder head is finally available for customers looking for the pinnacle of LS cathedral port performance.   The new 237cc port has been flow bench tested to flow over 330cfm \u0026amp; can support everything from smaller camshaft street engines all the way to all our race engines. This cylinder head is a combination of a max effort high flowing port combined. \u003cbr\u003e\u003cbr\u003e\n\u003cdiv\u003eFlow Data:\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e4.030\" Flow Plate - No Exhaust Pipe\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003ctable frame=\"below\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLIFT\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eINTAKE FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEXHAUST FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .100\"  \u003c\/td\u003e\n\u003ctd\u003e66 CFM \u003c\/td\u003e\n\u003ctd\u003e57 CFM \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .200\"  \u003c\/td\u003e\n\u003ctd\u003e 147 CFM\u003c\/td\u003e\n\u003ctd\u003e 117 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .300\"  \u003c\/td\u003e\n\u003ctd\u003e 225 CFM\u003c\/td\u003e\n\u003ctd\u003e 170 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .400\"  \u003c\/td\u003e\n\u003ctd\u003e 284 CFM\u003c\/td\u003e\n\u003ctd\u003e 206 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .500\"  \u003c\/td\u003e\n\u003ctd\u003e 325 CFM\u003c\/td\u003e\n\u003ctd\u003e 227 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .600\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 334 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 235 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .650\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 339 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 241 CFM\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894047096931,"sku":"199-SSPRC237CNC","price":2912.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/1163_f04320fe-b936-4357-8f4c-5171554fd2cf.png?v=1613333771"},{"product_id":"prc-247cc-cnc-ported-cylinder-heads","title":"PRC 247cc CNC Ported Cylinder Heads","description":"\u003cp\u003ePrecision Race Components all new cylinder head castings completed with 247cc runners. For 408 cubic inch and larger applications with 4.03\"+ bore sizing.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eto SEE why we build better heads!\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eFeatures: \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e247cc Fully CNC Ported Intake Runners\u003c\/li\u003e\n\u003cli\u003e84cc Fully CNC Ported Exhaust Runners\u003c\/li\u003e\n\u003cli\u003eTSP Dual Spring Kit w\/ PAC Springs Rated To .660\" Lift\u003c\/li\u003e\n\u003cli\u003e68cc CNC Machined Chambers\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003e2.120\" Intake \/ 1.600\" Stainless Valves\u003c\/li\u003e\n\u003cli\u003eFactory Rocker Friendly!!*\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003eThe all new 247cc cylinder head is finally available for customers looking for the pinnacle of LS cathedral port performance.   The new 247cc port has been flow bench tested to flow over 360cfm. \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cdiv\u003eFlow Data:\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e No Exhaust Pipe\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003ctable frame=\"below\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLIFT\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eINTAKE FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEXHAUST FLOW \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .100\"  \u003c\/td\u003e\n\u003ctd\u003e66 CFM \u003c\/td\u003e\n\u003ctd\u003e57 CFM \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .200\"  \u003c\/td\u003e\n\u003ctd\u003e 147 CFM\u003c\/td\u003e\n\u003ctd\u003e 117 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .300\"  \u003c\/td\u003e\n\u003ctd\u003e 228 CFM\u003c\/td\u003e\n\u003ctd\u003e 170 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .400\"  \u003c\/td\u003e\n\u003ctd\u003e 282 CFM\u003c\/td\u003e\n\u003ctd\u003e 206 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .500\"  \u003c\/td\u003e\n\u003ctd\u003e 321 CFM\u003c\/td\u003e\n\u003ctd\u003e 227 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .600\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 343 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 235 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e .650\"  \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 355 CFM\u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e 241 CFM\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"1\"\u003e.700\"    \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e360 CFM \u003c\/td\u003e\n\u003ctd colspan=\"1\"\u003e  245 CFM  \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"No Valve Springs Installed \/ Hollow-Stem Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves Standard 68cc","offer_id":31894071869539,"sku":"#199-PRC247-1","price":2774.39,"currency_code":"USD","in_stock":true},{"title":"No Valve Springs Installed \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894071902307,"sku":"#199-PRC247-2","price":2499.99,"currency_code":"USD","in_stock":true},{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves Standard 68cc","offer_id":31894071935075,"sku":"#199-PRC247-3","price":2999.99,"currency_code":"USD","in_stock":false},{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894071967843,"sku":"#199-PRC247-4","price":2879.99,"currency_code":"USD","in_stock":false},{"title":"TSP .750\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Stainless Steel Exhaust Valves Standard 68cc","offer_id":31894072000611,"sku":"#199-PRC247-5","price":2659.99,"currency_code":"USD","in_stock":true},{"title":"TSP .750\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Hollow-Stem Stainless Steel Intake Valves \/ Hollow-Stem Stainless Steel Exhaust Valves","offer_id":31894072033379,"sku":"#199-PRC247-6","price":2759.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/3557.png?v=1613333774"},{"product_id":"prc-ls3-aftermarket-6-bolt-260cc-cnc-cylinder-heads","title":"PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads","description":"\u003cp style=\"font-weight: 400;\"\u003eAll Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology!\u003cbr\u003e\u003cbr\u003e\u003ca style=\"font-style: inherit; font-weight: 900;\" href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e to SEE why we build better heads!\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cbr\u003ePRC's aftermarket casting LS3\/L92\/L99 cylinder heads come standard with the following options:\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNEW PRC 13-Degree Valve Angle LS3 Castings\u003c\/li\u003e\n\u003cli\u003eImproved Piston-to-Valve Clearance For Extra Compression \u0026amp; Larger Camshafts\u003c\/li\u003e\n\u003cli\u003eSmaller Than Stock Intake Port Volume For Improved Port Velocity\u003c\/li\u003e\n\u003cli\u003eManley Stainless 2.185\" Intake, 1.60\" Exhaust Valves\u003c\/li\u003e\n\u003cli\u003eBillet Rocker Pedestals\u003c\/li\u003e\n\u003cli\u003eTSP .660\" Dual Spring Kit w\/ PAC Valve Springs, Titanium Retainers, Seats, \u0026amp; Seals\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003eCompletely Assembled and Milled to Your Specifications\u003c\/li\u003e\n\u003cli\u003e60-68cc Chambers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-weight: 400;\"\u003eAll PRC cylinder heads are extensively researched and tested. The all-new PRC aftermarket casting LS3 cylinder heads are designed to flow considerably more than a gm ported casting while keeping the port sizes smaller for improved port velocity. The result is a cylinder head that is smaller than a stock GM LS3 port and moves more air than any other ls3 cylinder heads! \u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cbr\u003eThe all new PRC aftermarket casting LS3 heads are the perfect option for customers looking for the ultimate in LS3\/L99\/L92 cylinder head technology\u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003eThe PRC aftermarket casting LS3 cylinder heads are available in 2 different configurations: \u003c\/p\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e255cc Runners for max effort stock cube LS2\/LS3\/L99\/L92 engines looking for a 370cfm cylinder head that can be aggressively milled \u0026amp; still keep better than stock p\/v\u003c\/li\u003e\n\u003cli\u003e260cc Runners For LS3\/L99\/L92 stroker engines needing a 380cfm+ cylinder head!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003eThe 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!!  \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable style=\"font-style: inherit; font-weight: inherit;\" width=\"371\"\u003e\n\u003ctbody style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003e Lift\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003eIntake Flow \u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cb\u003e\u003cspan style=\"font-style: inherit;\"\u003e Exhaust Flow\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e .200\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 157 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 117 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e .300\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 224 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 170 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e .400\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 279 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e205 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e .500\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 329 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 225 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e .600\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 360 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e 235 cfm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e .650\"\u003c\/td\u003e\n\u003ctd\u003e 372 cfm\u003c\/td\u003e\n\u003ctd\u003e 240 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"font-style: inherit; font-weight: inherit;\"\u003e\n\u003ctd\u003e .700\"\u003c\/td\u003e\n\u003ctd\u003e 380 cfm\u003c\/td\u003e\n\u003ctd\u003e 243 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-style: inherit; font-weight: inherit;\"\u003e\u003cbr\u003eWith all PRC cylinder heads, quality and performance are our two highest priorities! In addition to performance, you will not find a better performing set of cylinder heads at this price (cost is for the pair!). Call one of our sales consultants today if you have any questions or if you would like to discuss your specific application. \u003cbr\u003e\u003c\/p\u003e","brand":"MailOrder Tuner","offers":[{"title":"Do Not Install Valve Spring Kit \/ Stainless Hollow-Stem Intake\/Stainless Steel Exhaust Valves \/ 68cc standard","offer_id":31897943670883,"sku":"#199-PRCLS36B260-1","price":2709.99,"currency_code":"USD","in_stock":false},{"title":"TSP .660\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Stainless Hollow-Stem Intake\/Stainless Steel Exhaust Valves \/ 68cc standard","offer_id":31897943965795,"sku":"#199-PRCLS36B260-10","price":2937.59,"currency_code":"USD","in_stock":true},{"title":"TSP .750\" Dual Spring Kit Featuring PAC Valve Springs w\/ Titanium Retainers \/ Stainless Hollow-Stem Intake\/Stainless Steel Exhaust Valves \/ 68cc standard","offer_id":31897944260707,"sku":"#199-PRCLS36B260-19","price":3250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/4008_7d19b9b4-dfb1-40a8-bfd3-42838bdfe2ac.png?v=1613333779"},{"product_id":"prc-ls3-l92-lsa-cnc-cylinder-head-porting","title":"PRC LS3, L92, \u0026 LSA CNC Cylinder Head Porting","description":"\u003cstrong\u003eTons of R\u0026amp;D on both the flow bench \u0026amp; engine dyno has created one of the leading LS3\/ cylinder heads available!\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe PRC LS3 cylinder heads porting for customers with existing LS-3 cylinder heads.  Corvette \u0026amp; 2010 Camaro customers can now send in their heads to be ported!\u003c\/span\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable align=\"center\" border=\"1\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e Stock Valve Weight\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e Stainless Valve Weight\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eHollow Stem Valve Weight \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e 106\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e 122\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e 91\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e Grams\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e Grams\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e Grams\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cstrong\u003e\u003cbr\u003ePrecision Race Components\u003c\/strong\u003e\u003cspan\u003e LS3\/L92 CNC ported cylinder heads.  Fully CNC ported LS3-based cylinder heads!\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e2.165\"\/1.59\" Valves\u003c\/li\u003e\n\u003cli\u003ePRC Double Spring Kit AVAILABLE\u003c\/li\u003e\n\u003cli\u003eCompletely Assembled \u0026amp; Setup To Your Specs!!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003eService Includes:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder Head Cleaning\u003c\/li\u003e\n\u003cli\u003eCNC Valve Job\u003c\/li\u003e\n\u003cli\u003eCNC Porting\u003c\/li\u003e\n\u003cli\u003eMilling to customers specs\u003c\/li\u003e\n\u003cli\u003eFully Assembled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003eDyno Tested 25+HP Gains Over Stock 6.2L Cylinder Heads!\u003c\/span\u003e\n\u003ctable align=\"center\" border=\"1\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e PRC LS3 Intake\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e PRC LS3 Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e cfm\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .200\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 154\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 115\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .300\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 223\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 170\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .400\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 282\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 198\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .500\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 324\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 211\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .600\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 351\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 228\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\"\u003e .650\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e \u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 358\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e 232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e*Typically a 1-2 week turn around time once heads arrive at our facility.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"ProductWarnings\"\u003e\n\u003cdiv class=\"Warning_prop-65\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"Re-use Stock Supplied Valves \/ No Springs","offer_id":31897957924963,"sku":"#199-CNCPORTLS3-1","price":899.99,"currency_code":"USD","in_stock":true},{"title":"Re-use Stock Supplied Valves \/ TSP .660\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897957957731,"sku":"#199-CNCPORTLS3-2","price":1214.98,"currency_code":"USD","in_stock":true},{"title":"Re-use Stock Supplied Valves \/ TSP .750\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897957990499,"sku":"#199-CNCPORTLS3-3","price":1279.98,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Steel Valves \/ No Springs","offer_id":31897958023267,"sku":"#199-CNCPORTLS3-4","price":1071.71,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Steel Valves \/ TSP .660\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958056035,"sku":"#199-CNCPORTLS3-5","price":1386.7,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Steel Valves \/ TSP .750\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958088803,"sku":"#199-CNCPORTLS3-6","price":1451.7,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" GM Hollow Stem Intake Valves \/ No Springs","offer_id":31897958121571,"sku":"#199-CNCPORTLS3-7","price":1164.99,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" GM Hollow Stem Intake Valves \/ TSP .660\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958154339,"sku":"#199-CNCPORTLS3-8","price":1399.97,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" GM Hollow Stem Intake Valves \/ TSP .750\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958187107,"sku":"#199-CNCPORTLS3-9","price":1464.98,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Hollow-Stem\/Stainless Exhaust Valves \/ No Springs","offer_id":31897958219875,"sku":"#199-CNCPORTLS3-10","price":1422.13,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Hollow-Stem\/Stainless Exhaust Valves \/ TSP .660\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958252643,"sku":"#199-CNCPORTLS3-11","price":1732.12,"currency_code":"USD","in_stock":true},{"title":"2.165\"\/1.59\" Stainless Hollow-Stem\/Stainless Exhaust Valves \/ TSP .750\" Lift Dual Spring Kit w\/ Titanium Retainers featuring PAC Valve Springs","offer_id":31897958285411,"sku":"#199-CNCPORTLS3-12","price":1599.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/1388.png?v=1613333783"},{"product_id":"prc-ls7x-265cc-7-0l-cnc-head-porting","title":"PRC LS7x 265cc 7.0L CNC Head Porting","description":"\u003cdiv\u003e\n\u003cstrong\u003eThese are for customer supplied cylinder heads. We are not supplying castings! This is porting, valve job, and milling only!\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cstrong\u003ePrecision Race Components\u003c\/strong\u003e\u003cspan\u003e LS7 CNC 265cc ported cylinder heads.  Fully CNC ported LS7-based cylinder heads! (All New GM LS7 Cylinder Head Castings)\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eBased off PRC's CNC Ported LS7 Heads\u003c\/li\u003e\n\u003cli\u003e2.200\"\/1.610\" Valves (base price for exchange includes new stainless exhaust valves)\u003c\/li\u003e\n\u003cli\u003eAvailable with PRC Double Spring Kit Complete With PRC Double Springs, Titanium Retainers, Seats, \u0026amp; Seals\u003c\/li\u003e\n\u003cli\u003eCompletely Assembled \u0026amp; Setup To Your Specs!!\u003c\/li\u003e\n\u003cli\u003eAvailable With Stainless, Hollow Stems, or titanium valves!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003eExtensive CNC \u0026amp; dyno testing has resulted in one of the most affordable \u0026amp; powerful LS7 based cylinder heads available! Flowing up to 35cfm more than the stock GM LS7 head, the all new PRC cylinder head offers both unmatched power \u0026amp; airflow.  The PRC LS7 cylinder head is available with standard stainless exhaust valves and titanium intake valves.\u003c\/span\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cspan\u003eFlow Data:  @ 4.125\" Bore Plate  Superflow 600\u003c\/span\u003e\n\u003ctable width=\"100%\" align=\"center\" border=\"1\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e \n\u003cp\u003eLS7 \u003cbr\u003eIntake\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e LS7 Exhaust\u003c\/td\u003e\n\u003ctd\u003e  PRC 265cc \u003cbr\u003eLS7 Intake\u003c\/td\u003e\n\u003ctd\u003e  PRC LS7 Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .200\u003c\/td\u003e\n\u003ctd\u003e 161\u003c\/td\u003e\n\u003ctd\u003e 114\u003c\/td\u003e\n\u003ctd\u003e 169\u003c\/td\u003e\n\u003ctd\u003e 119 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .300\u003c\/td\u003e\n\u003ctd\u003e 227\u003c\/td\u003e\n\u003ctd\u003e 171 \u003c\/td\u003e\n\u003ctd\u003e 248\u003c\/td\u003e\n\u003ctd\u003e 179 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .400\u003c\/td\u003e\n\u003ctd\u003e 291\u003c\/td\u003e\n\u003ctd\u003e 193 \u003c\/td\u003e\n\u003ctd\u003e 308\u003c\/td\u003e\n\u003ctd\u003e 211 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .500\u003c\/td\u003e\n\u003ctd\u003e 330\u003c\/td\u003e\n\u003ctd\u003e 203 \u003c\/td\u003e\n\u003ctd\u003e351\u003c\/td\u003e\n\u003ctd\u003e 224 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .600\u003c\/td\u003e\n\u003ctd\u003e 351 \u003c\/td\u003e\n\u003ctd\u003e 209\u003c\/td\u003e\n\u003ctd\u003e383\u003c\/td\u003e\n\u003ctd\u003e 235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .650\u003c\/td\u003e\n\u003ctd\u003e 353\u003c\/td\u003e\n\u003ctd\u003e 204\u003c\/td\u003e\n\u003ctd\u003e388\u003c\/td\u003e\n\u003ctd\u003e 241\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .700\u003c\/td\u003e\n\u003ctd\u003e 353\u003c\/td\u003e\n\u003ctd\u003e 209\u003c\/td\u003e\n\u003ctd\u003e393\u003c\/td\u003e\n\u003ctd\u003e 246\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003cspan\u003e**If stock valve guides are damaged or badly worn, there is an additional $150 fee to replace them.\u003cbr\u003e**If stock guides are replaced, stock springs can not be used due to the larger O.D. of the aftermarket guide. Spring kit must be replaced with aftermarket as well.\u003c\/span\u003e\u003c\/strong\u003e","brand":"MailOrder Tuner","offers":[{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ No Spring Kit Installed \/ Do Not Replace Valves Guides","offer_id":31897967493219,"sku":"#199-265LS7-1","price":959.99,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ No Spring Kit Installed \/ Replace Valve Guides","offer_id":31897967525987,"sku":"#199-265LS7-2","price":1109.99,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967558755,"sku":"#199-265LS7-3","price":1259.98,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967591523,"sku":"#199-265LS7-4","price":1409.98,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967624291,"sku":"#199-265LS7-5","price":1319.98,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967657059,"sku":"#199-265LS7-6","price":1469.98,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967689827,"sku":"#199-265LS7-7","price":1319.98,"currency_code":"USD","in_stock":true},{"title":"Replace Exhaust Valves with 1.610\" Stainless Steel Reuse Customer's Intake Valves \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967722595,"sku":"#199-265LS7-8","price":1469.98,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ No Spring Kit Installed \/ Do Not Replace Valves Guides","offer_id":31897967755363,"sku":"#199-265LS7-9","price":1319.98,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ No Spring Kit Installed \/ Replace Valve Guides","offer_id":31897967788131,"sku":"#199-265LS7-10","price":1469.98,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967820899,"sku":"#199-265LS7-11","price":1619.97,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967853667,"sku":"#199-265LS7-12","price":1769.97,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967886435,"sku":"#199-265LS7-13","price":1679.97,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967919203,"sku":"#199-265LS7-14","price":1819.97,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897967951971,"sku":"#199-265LS7-15","price":1669.97,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.20\" Intake\/Stainless Exhaust \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897967984739,"sku":"#199-265LS7-16","price":1941.98,"currency_code":"USD","in_stock":true},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ No Spring Kit Installed \/ Do Not Replace Valves Guides","offer_id":31897968017507,"sku":"#199-265LS7-17","price":1819.98,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ No Spring Kit Installed \/ Replace Valve Guides","offer_id":31897968050275,"sku":"#199-265LS7-18","price":1969.98,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897968083043,"sku":"#199-265LS7-19","price":2169.97,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .660\" Lift Dual Spring Kit w\/ PAC Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897968115811,"sku":"#199-265LS7-20","price":2319.99,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897968148579,"sku":"#199-265LS7-21","price":2229.97,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .700\" Lift Dual Spring Kit w\/ PAC 1207X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897968181347,"sku":"#199-265LS7-22","price":2379.97,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Do Not Replace Valves Guides","offer_id":31897968214115,"sku":"#199-265LS7-23","price":2229.97,"currency_code":"USD","in_stock":false},{"title":"2.200\"\/1.61\" Titanium Intake\\Stainless Exhaust \/ TSP .750\" Lift Dual Spring Kit w\/ PAC 1209X Springs \u0026 Titanium Retainers \/ Replace Valve Guides","offer_id":31897968246883,"sku":"#199-265LS7-24","price":2379.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/1413.png?v=1613333784"},{"product_id":"prc-ls7x-265cc-cnc-heads","title":"PRC LS7x 265cc CNC Heads","description":"\u003cp\u003e\u003cspan\u003ePrecision Race Components\u003c\/span\u003e LS7 CNC 265cc ported cylinder heads.\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ca href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eto SEE why we build better heads!  \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n \n\u003cul\u003e\n\u003cli\u003ePRC 6-Bolt LS7 Cylinder Heads with Thicker Deck Surface\u003c\/li\u003e\n\u003cli\u003eWill Work on Both Standard GM 4-Bolt \u0026amp; Aftermarket LSx \/ RHS 6-Bolt Style Engine Blocks\u003c\/li\u003e\n\u003cli\u003e2.200\"\/1.610\" Valves\u003c\/li\u003e\n\u003cli\u003eTSP .660\" Dual Spring Kit w\/ PAC Springs, Retainers, Seats, \u0026amp; Seals\u003cbr\u003eSprings, Titanium Retainers, Seats, \u0026amp; Seals\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003eCompletely Assembled \u0026amp; Setup To Your Specs\u003c\/li\u003e\n\u003cli\u003eAvailable With Stainless Steel, Hollow-Stem, or Titanium Intake Valves\u003c\/li\u003e\n\u003c\/ul\u003e\nExtensive CNC and dyno testing has resulted in one of the most affordable and powerful LS7-based cylinder heads available! Flowing up to 35 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow!\u003cbr\u003e\u003cbr\u003eThe PRC LS7 cylinder heads is available with standard stainless valves, hollow-stem intake, and titanium intake valves.  If you are going to run the stainless steel intake valves, we recommend limiting total valve lift to no more than .616\" due to the weight of the intake valve.  Upgrading to the hollow-stem intake valve will shed significant intake valve weight and allow for additional lift.  The titanium intake valves will be the lightest choice of the three choices and offer the best lift possible!\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\nFlow Data:  @ 4.125\" Bore Plate  Superflow 600\n\u003ctable width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" border=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 74px;\"\u003e\n\u003ctd style=\"height: 74px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 74px;\"\u003e \n\u003cp\u003eLS7 \u003cbr\u003eIntake\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"height: 74px;\"\u003e LS7 Exhaust\u003c\/td\u003e\n\u003ctd style=\"height: 74px;\"\u003e  PRC 265cc \u003cbr\u003eLS7 Intake\u003c\/td\u003e\n\u003ctd style=\"height: 74px;\"\u003e  PRC LS7 Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.7812px;\"\u003e\n\u003ctd style=\"height: 25.7812px;\"\u003e .200\u003c\/td\u003e\n\u003ctd style=\"height: 25.7812px;\"\u003e 161\u003c\/td\u003e\n\u003ctd style=\"height: 25.7812px;\"\u003e 114\u003c\/td\u003e\n\u003ctd style=\"height: 25.7812px;\"\u003e 169\u003c\/td\u003e\n\u003ctd style=\"height: 25.7812px;\"\u003e 119 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .300\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 227\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 171 \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 248\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 179 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .400\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 291\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 193 \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 308\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 211 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .500\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 330\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 203 \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e351\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 224 \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .600\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 351 \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 209\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e383\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .650\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 353\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 204\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e388\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 241\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e .700\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 353\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 209\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e393\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e 246\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003ctd style=\"height: 19px;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e **Valve spring lift ratings are based on using titanium intake valves.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"1.61\" Stainless Exhaust Valve \/ 2.200\" Titanium Intake Valve \/ TSP .660\" Dual Spring Kit w\/ PAC Valve Springs \u0026 Titanium Retainers","offer_id":31897980698723,"sku":"199-SSPRCLS7265","price":3935.99,"currency_code":"USD","in_stock":true},{"title":"1.61\" Hollow-Stem Exhaust Valve \/ 2.200\" Titanium Intake Valve \/ TSP .660\" Dual Spring Kit w\/ PAC Valve Springs \u0026 Titanium Retainers","offer_id":31897980960867,"sku":"199-SSPRCLS7265","price":3935.99,"currency_code":"USD","in_stock":true},{"title":"1.61\" Inconel Exhaust Valve Upgrade \/ 2.200\" Titanium Intake Valve \/ TSP .660\" Dual Spring Kit w\/ PAC Valve Springs \u0026 Titanium Retainers","offer_id":31897981223011,"sku":"199-SSPRCLS7265","price":3935.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/1236.png?v=1613333789"},{"product_id":"prc-ls7x-265cc-cnc-small-bore-heads","title":"PRC LS7x 265cc CNC Small Bore Heads","description":"\u003cdiv\u003e\u003cspan\u003eRequires at least a 4.065\" Bore \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cspan\u003ePrecision Race Components\u003c\/span\u003e\u003cspan\u003e LS7 CNC 265cc ported cylinder heads. \u003c\/span\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ca href=\"http:\/\/www.texas-speed.com\/t-prcheads.aspx\"\u003eClick Here\u003c\/a\u003e to SEE why we build better heads! \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eMADE IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eCAST IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMACHINED IN THE USA!!\u003c\/span\u003e\u003c\/div\u003e\n \n\u003cul\u003e\n\u003cli\u003ePRC 6-Bolt LS7 Cylinder Heads with Thicker Deck Surface\u003c\/li\u003e\n\u003cli\u003eWill Work on Both Standard GM 4-Bolt \u0026amp; Aftermarket LSx \/ RHS 6-Bolt Style Engine Blocks\u003c\/li\u003e\n\u003cli\u003e2.205\"\/1.59\" Valves\u003c\/li\u003e\n\u003cli\u003eTSP .660\" Dual Spring Kit w\/ PAC Springs, Retainers, Seats, \u0026amp; Seals\u003cbr\u003eSprings, Titanium Retainers, Seats, \u0026amp; Seals\u003c\/li\u003e\n\u003cli\u003eCHE Bronze Guides\u003c\/li\u003e\n\u003cli\u003eCompletely Assembled \u0026amp; Setup To Your Specs\u003c\/li\u003e\n\u003cli\u003eAvailable With Stainless Steel, Hollow-Stem, or Titanium Intake Valves\u003c\/li\u003e\n\u003cli\u003e68cc Chamber Size as Standard\u003c\/li\u003e\n\u003c\/ul\u003e\nExtensive CNC and dyno testing has resulted in one of the most affordable and powerful LS7-based cylinder heads available! Flowing up to 35 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow!\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe PRC Small Bore LS7 cylinder heads are designed for both stroker, and stock cube applications with a 4.060\"-4.100\" bore.  For bores larger than 4.100\" bore checkout the PRC LS7 265cc \u0026amp; 285cc cylinder heads!\u003cbr\u003e\u003cbr\u003eThe PRC LS7 cylinder heads are available with hollow-stem intake and titanium intake valves. We recommend no more than .625\" total intake valve lift with the hollow-stem intake valves and no more than .670\" total valve lift with the titanium intake valves.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\nSuperflow 600\u003c\/div\u003e\n\u003cdiv\u003e  \n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" border=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e  PRC 265cc \u003cbr\u003eLS7 Intake\u003c\/td\u003e\n\u003ctd\u003e  PRC LS7 Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .200\u003c\/td\u003e\n\u003ctd\u003e 169\u003c\/td\u003e\n\u003ctd\u003e 118\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .300\u003c\/td\u003e\n\u003ctd\u003e 246\u003c\/td\u003e\n\u003ctd\u003e 176\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .400\u003c\/td\u003e\n\u003ctd\u003e 304\u003c\/td\u003e\n\u003ctd\u003e 208\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .500\u003c\/td\u003e\n\u003ctd\u003e348\u003c\/td\u003e\n\u003ctd\u003e 221\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .600\u003c\/td\u003e\n\u003ctd\u003e380\u003c\/td\u003e\n\u003ctd\u003e 230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .650\u003c\/td\u003e\n\u003ctd\u003e383\u003c\/td\u003e\n\u003ctd\u003e 235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e .700\u003c\/td\u003e\n\u003ctd\u003e388\u003c\/td\u003e\n\u003ctd\u003e 240\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e **Valve spring lift ratings are based on using titanium intake valves.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MailOrder Tuner","offers":[{"title":"Hollow-Stem 2.205\" Intake\/Stainless Exhaust \/ No Valve Spring Kit Installed","offer_id":31898000621667,"sku":"#199-PRCLS76B265-SB-1","price":3935.99,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.205\" Intake\/Stainless Exhaust \/ TSP .660\" Dual Spring Kit w\/ PAC Valve Springs \u0026 Titanium Retainers","offer_id":31898000654435,"sku":"#199-PRCLS76B265-SB-2","price":2974.99,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.205\" Intake\/Stainless Exhaust \/ TSP .700\" Dual Spring Kit w\/ PAC 1207X Valve Springs \u0026 Titanium Retainers","offer_id":31898000687203,"sku":"#199-PRCLS76B265-SB-3","price":3034.99,"currency_code":"USD","in_stock":true},{"title":"Hollow-Stem 2.205\" Intake\/Stainless Exhaust \/ TSP .750\" Dual Spring Kit w\/ PAC 1209X Valve Springs \u0026 Titanium Retainers","offer_id":31898000719971,"sku":"#199-PRCLS76B265-SB-4","price":3034.99,"currency_code":"USD","in_stock":true},{"title":"2.205\"\/1.59\" Titanium Intake\/Stainless Exhaust \/ No Valve Spring Kit Installed","offer_id":31898000752739,"sku":"#199-PRCLS76B265-SB-5","price":3274.99,"currency_code":"USD","in_stock":true},{"title":"2.205\"\/1.59\" Titanium Intake\/Stainless Exhaust \/ TSP .660\" Dual Spring Kit w\/ PAC Valve Springs \u0026 Titanium Retainers","offer_id":31898000785507,"sku":"#199-PRCLS76B265-SB-6","price":3474.99,"currency_code":"USD","in_stock":true},{"title":"2.205\"\/1.59\" Titanium Intake\/Stainless Exhaust \/ TSP .700\" Dual Spring Kit w\/ PAC 1207X Valve Springs \u0026 Titanium Retainers","offer_id":31898000818275,"sku":"#199-PRCLS76B265-SB-7","price":3534.99,"currency_code":"USD","in_stock":true},{"title":"2.205\"\/1.59\" Titanium Intake\/Stainless Exhaust \/ TSP .750\" Dual Spring Kit w\/ PAC 1209X Valve Springs \u0026 Titanium Retainers","offer_id":31898000851043,"sku":"#199-PRCLS76B265-SB-8","price":3534.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/3948.png?v=1613333788"},{"product_id":"gm-lsx-center-bolt-valve-cover-gasket","title":"GM LSX Center-bolt Valve Cover Gasket","description":"\u003cspan\u003eGM LSX center-bolt valve cover gaskets. Works in 1999+ GM valve covers!\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eGASKETS ARE SOLD INDIVIDUALLY!\u003c\/span\u003e","brand":"MailOrder Tuner","offers":[{"title":"Default Title","offer_id":32165606424675,"sku":"28-12637683","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/products\/226.png?v=1613334935"},{"product_id":"mangum-racing-273cc-ls7-cylinder-heads","title":"Mangum Racing 273cc LS7 Cylinder Heads","description":"\u003ch2\u003eMangum Racing 273cc Qualcast LS7 Cylinder Heads\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eMangum Racing CNC Ported 273 LS7 Cylinder Heads\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt from the Qualcast stock style replacement LS7 casting, the Mangum Racing 273 program is designed for high-rpm, large-displacement LS combinations that demand elite airflow and structural integrity.\u003c\/p\u003e\n\u003cp\u003eFeaturing a 12° valve angle and OEM LS7 valve spacing\/valve length, this 6-bolt casting delivers exceptional port efficiency while maintaining compatibility with LS7-based platforms. With a 273cc CNC intake runner and optimized 93cc exhaust port, this cylinder head is engineered for serious naturally aspirated builds and high-output boosted applications where the customer wants a near bolt on cylinder head.\u003c\/p\u003e\n\u003cp\u003eEach set is fully CNC machined in-house on our Centroid 5-axis machining centers and finished on Newen seat and guide equipment. Every head is hand blended, assembled, and inspected in small batches to ensure dimensional accuracy and repeatable performance.\u003c\/p\u003e\n\u003ch3\u003eAirflow Performance\u003c\/h3\u003e\n\u003cp\u003eTested on a SuperFlow 1020 with a 4.125” bore plate\u003c\/p\u003e\n\u003cp\u003eIntake (Radius Entry)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e.200” – 160 CFM\u003c\/li\u003e\n\u003cli\u003e.300” – 255 CFM\u003c\/li\u003e\n\u003cli\u003e.400” – 311 CFM\u003c\/li\u003e\n\u003cli\u003e.500” – 352 CFM\u003c\/li\u003e\n\u003cli\u003e.600” – 380 CFM\u003c\/li\u003e\n\u003cli\u003e.700” – 390 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExhaust (No Pipe)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e.200” – 117 CFM\u003c\/li\u003e\n\u003cli\u003e.300” – 160 CFM\u003c\/li\u003e\n\u003cli\u003e.400” – 209 CFM\u003c\/li\u003e\n\u003cli\u003e.500” – 221 CFM\u003c\/li\u003e\n\u003cli\u003e.600” – 230 CFM\u003c\/li\u003e\n\u003cli\u003e.700” – 244 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 273 LS7 delivers outstanding mid-lift efficiency with dominant high-lift airflow, making it ideal for aggressive street \/ strip combinations.\u003c\/p\u003e\n\u003ch3\u003ePremium Hardware \u0026amp; Construction\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e6-bolt Qualcast LS7 casting\u003c\/li\u003e\n\u003cli\u003e12° valve angle with OEM LS7 valve spacing\u003c\/li\u003e\n\u003cli\u003eStock Valve Lengths\u003c\/li\u003e\n\u003cli\u003e273cc CNC intake port\u003c\/li\u003e\n\u003cli\u003e93cc exhaust port\u003c\/li\u003e\n\u003cli\u003e70.5cc CNC combustion chambers (milling available at no charge)\u003c\/li\u003e\n\u003cli\u003e2.200” titanium intake valves\u003c\/li\u003e\n\u003cli\u003e1.610” stainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eBronze CHE guides\u003c\/li\u003e\n\u003cli\u003ePAC .660” dual spring package\u003c\/li\u003e\n\u003cli\u003eTitanium retainers\u003c\/li\u003e\n\u003cli\u003eViton seals\u003c\/li\u003e\n\u003cli\u003e1.250” steel spring seats\u003c\/li\u003e\n\u003cli\u003eChamber softening available\u003c\/li\u003e\n\u003cli\u003eFlat milling at .006” per cc\u003c\/li\u003e\n\u003cli\u003eMinimum bore: 4.100”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesigned for LS7 Street \u0026amp; Strip Builds\u003c\/h3\u003e\n\u003cp\u003eWith airflow over 390 CFM at .700” lift, the Mangum Racing 273 LS7 is capable of supporting serious naturally aspirated horsepower in 427+ cubic inch combinations.\u003c\/p\u003e\n\u003cp\u003eStock pushrod length works in many applications but should always be verified based on camshaft selection and final milling.\u003c\/p\u003e","brand":"MailOrder Tuner","offers":[{"title":"Default Title","offer_id":51841259864365,"sku":"MR-273LS7","price":3299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/3097\/4819\/files\/MR-273LS7.webp?v=1771882249"}],"url":"https:\/\/mailordertuner.com\/collections\/c6-corvette-heads\/cylinder-heads.oembed","provider":"MailOrder Tuner","version":"1.0","type":"link"}