- 427
- 5 gen
- 5.7
- 6 GEN
- c5
- c6
- C6 Corvette Intakes
- Camaro 5 Tune
- Camaro 6.2L tune
- Camaro DOD delete
- Camaro Email tune
- camaro exhaust
- camaro gen 5
- camaro ls1
- Camaro ls3
- camaro ls6
- Camaro Remote tune
- Camaro tuner
- Camaro Z28 tune
- corvette ls3
- DOD Delete Kits
- F body MailOrderTune
- F body tune
- F body tuner
- fbody
- Gen 5 Camaro Intakes
- GTO LS2 tune
- GTO Remote tune
- GTo remote tuning
- gto tune
- GTO Tuner
- hptuners
- HPTUNERS CUSTOM TUNE
- HPTUNERS KIT
- Hptuners MPVI
- hptuners pro
- L83 DOD delete
- L83 Oil consumption
- L83 tuning
- L99 tuner
- ls1
- LS1 5.7
- ls1 camshaft
- ls1 Email tune
- ls2
- ls2 camshaft
- ls2 corvette
- ls2 gto
- LS2 tuner
- ls3
- ls3 camaro
- LS3 gto tune
- ls3 heads
- ls6 tune
- ls6 tuner
- ls6 tuning
- LS7
- LSX
- LSX tune
- LSX tuner
- lsx tuning
- mail order tune
- MailOrderTune
- MailOrdertuner
- PRC
- PRC heads
- Remote tune
- Remote tuner
- stage 1
- stage 2
- stage 3 camshaft
- stage 4 camshaft
- texas speed
- Texas speed tune
- Texas Speed tuner
- trans
- truck cam
- truck camshaft
- VVT camshaft
- Z28
- 427
- 5 gen
- 5.7
- 6 GEN
- c5
- c6
- C6 Corvette Intakes
- Camaro 5 Tune
- Camaro 6.2L tune
- Camaro DOD delete
- Camaro Email tune
- camaro exhaust
- camaro gen 5
- camaro ls1
- Camaro ls3
- camaro ls6
- Camaro Remote tune
- Camaro tuner
- Camaro Z28 tune
- corvette ls3
- DOD Delete Kits
- F body MailOrderTune
- F body tune
- F body tuner
- fbody
- Gen 5 Camaro Intakes
- GTO LS2 tune
- GTO Remote tune
- GTo remote tuning
- gto tune
- GTO Tuner
- hptuners
- HPTUNERS CUSTOM TUNE
- HPTUNERS KIT
- Hptuners MPVI
- hptuners pro
- L83 DOD delete
- L83 Oil consumption
- L83 tuning
- L99 tuner
- ls1
- LS1 5.7
- ls1 camshaft
- ls1 Email tune
- ls2
- ls2 camshaft
- ls2 corvette
- ls2 gto
- LS2 tuner
- ls3
- ls3 camaro
- LS3 gto tune
- ls3 heads
- ls6 tune
- ls6 tuner
- ls6 tuning
- LS7
- LSX
- LSX tune
- LSX tuner
- lsx tuning
- mail order tune
- MailOrderTune
- MailOrdertuner
- PRC
- PRC heads
- Remote tune
- Remote tuner
- stage 1
- stage 2
- stage 3 camshaft
- stage 4 camshaft
- texas speed
- Texas speed tune
- Texas Speed tuner
- trans
- truck cam
- truck camshaft
- VVT camshaft
- Z28
PRC CNC Porting Service - Cathedral Port Heads (Customer Supplied Castings)
Regular price $899.99 Save $-899.99The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include aftermarket 2.02/1.57 stainless steel valves. We also offer valve spring upgrades.
PRC CNC Porting/Machining Service Includes:
- Disassembly
- Deep Cleaning
- CNC Porting
- CNC Valve Job
- CNC Engraving of PRC Logos
- CNC Milling to Your Specs
- Reassembly
- Pressure Testing
Click Here to SEE why we build better heads! All Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology. With all PRC cylinder heads, quality and performance are our two highest priorities! In addition to this, you will not find a better performing cylinder head porting service at this price. Call one of our sales consultants today if you have any questions or if you would like to discuss your specific application.
Stage 2.5 5.3L Flow Chart |
|||
Lift | Intake Flow |
Exhaust Flow |
|
.200" | 147 cfm |
111 cfm |
|
.300" | 207 cfm |
145 cfm |
|
.400" | 254 cfm |
185 cfm |
|
.500" | 291 cfm |
204 cfm |
|
.600" | 308 cfm |
223 cfm |
Stage 1.0 LS6 Flow Chart |
|||
Lift | Intake Flow |
Exhaust Flow |
|
.200" | 147 cfm |
114 cfm |
|
.300" | 207 cfm |
148 cfm |
|
.400" | 255 cfm |
187 cfm |
|
.500" | 292 cfm |
202 cfm |
|
.600" | 313 cfm |
220 cfm |
Stage 2.5 LS6 Flow Chart |
|||
Lift | Intake Flow |
Exhaust Flow |
|
.200" | 147 cfm |
114 cfm |
|
.300" | 207 cfm |
152 cfm |
|
.400" | 255 cfm |
191 cfm |
|
.500" | 292 cfm |
207 cfm |
|
.600" | 316 cfm |
226 cfm |
Stage 1.0 LQ9 Flow Chart |
|||
Lift | Intake Flow |
Exhaust Flow |
|
.200" | 147 cfm |
114 cfm |
|
.300" | 207 cfm |
148 cfm |
|
.400" | 255 cfm |
187 cfm |
|
.500" | 292 cfm |
202 cfm |
|
.600" | 313 cfm |
220 cfm |
Stage 2.5 LQ9 Flow Chart |
|||
Lift | Intake Flow |
Exhaust Flow |
|
.200" | 147 cfm |
114 cfm |
|
.300" | 209 cfm |
152 cfm |
|
.400" | 258 cfm |
191 cfm |
|
.500" | 294 cfm |
207 cfm |
|
.600" | 316 cfm |
226 cfm |
*Typically a 1-2 week turn around time once heads arrive at our facility.
*Stage 1 porting NOT available for 4.8L and 5.3L castings due to the factory 1.94" intake valve size. All 4.8L and 5.3L cylinder heads must select the stage 2.5 option that includes 2.02"/1.57" stainless steel valves!
Castings:
- 4.8/5.3 (706/862)
- LS1 (241/853)
- LQ4/LQ9 (317)
- LS6/LS2 (243/799)
PRC LS7x 265cc CNC Small Bore Heads
Regular price $3,935.99 Save $-3,935.99- PRC 6-Bolt LS7 Cylinder Heads with Thicker Deck Surface
- Will Work on Both Standard GM 4-Bolt & Aftermarket LSx / RHS 6-Bolt Style Engine Blocks
- 2.205"/1.59" Valves
- TSP .660" Dual Spring Kit w/ PAC Springs, Retainers, Seats, & Seals
Springs, Titanium Retainers, Seats, & Seals - CHE Bronze Guides
- Completely Assembled & Setup To Your Specs
- Available With Stainless Steel, Hollow-Stem, or Titanium Intake Valves
- 68cc Chamber Size as Standard
The 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.
PRC 265cc LS7 Intake |
PRC LS7 Exhaust | |
.200 | 169 | 118 |
.300 | 246 | 176 |
.400 | 304 | 208 |
.500 | 348 | 221 |
.600 | 380 | 230 |
.650 | 383 | 235 |
.700 | 388 | 240 |
**Valve spring lift ratings are based on using titanium intake valves.
PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads
Regular price $2,937.59 Save $-2,937.59All Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology!
Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
PRC's aftermarket casting LS3/L92/L99 cylinder heads come standard with the following options:
- NEW PRC 13-Degree Valve Angle LS3 Castings
- Improved Piston-to-Valve Clearance For Extra Compression & Larger Camshafts
- Smaller Than Stock Intake Port Volume For Improved Port Velocity
- Manley Stainless 2.185" Intake, 1.60" Exhaust Valves
- Billet Rocker Pedestals
- TSP .660" Dual Spring Kit w/ PAC Valve Springs, Titanium Retainers, Seats, & Seals
- CHE Bronze Guides
- Completely Assembled and Milled to Your Specifications
- 60-68cc Chambers
All 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!
The all new PRC aftermarket casting LS3 heads are the perfect option for customers looking for the ultimate in LS3/L99/L92 cylinder head technology
The PRC aftermarket casting LS3 cylinder heads are available in 2 different configurations:
- 255cc Runners for max effort stock cube LS2/LS3/L99/L92 engines looking for a 370cfm cylinder head that can be aggressively milled & still keep better than stock p/v
- 260cc Runners For LS3/L99/L92 stroker engines needing a 380cfm+ cylinder head!
The 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!!
Lift |
Intake Flow |
Exhaust Flow |
.200" |
157 cfm |
117 cfm |
.300" |
224 cfm |
170 cfm |
.400" |
279 cfm |
205 cfm |
.500" |
329 cfm |
225 cfm |
.600" |
360 cfm |
235 cfm |
.650" | 372 cfm | 240 cfm |
.700" | 380 cfm | 243 cfm |
With 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.
PRC As-Cast 225cc LS1/LS2 Cathedral Heads
Regular price $2,203.19 Save $-2,203.19Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
- As-Cast 225cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow!
- Small Bore Configurations for extra compression applications while keeping good piston to valve clearance
- Large Bore Configurations for customers looking for bigger bores such as stroker or boost applications
- 62cc or 68cc CNC Machined Chambers (Can be milled to your desired specs)
- 2.06" Intake / 1.600" Stainless Valves
- Utilizes Factory LS1 Rocker Arms
- Includes TSP Dual Spring Kit w/ PAC .660" Valve Springs!
- ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***
The all new PRC 225cc As-Cast cylinder heads are finally available for customers looking for the ultimate as-cast cathedral LS heads available. The new PRC as-cast intake port has been flow bench tested to flow over 320cfm & can support everything from smaller camshaft street engines all the way to all out 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. You have your choice of the 62cc chambers used in the PRC 227cc cylinder heads or the 68cc chambers used in the PRC 237cc cylinder heads. We can mill additionally to get to your desired chamber size for no additional charge!
Flow Data (4.00" Flow Plate - No Exhaust Pipe):
LIFT |
INTAKE FLOW |
EXHAUST FLOW |
.100" |
68 CFM |
56 CFM |
.200" |
145 CFM |
113 CFM |
.300" |
210 CFM |
164 CFM |
.400" |
257 CFM |
200 CFM |
.500" |
300 CFM |
214 CFM |
.600" |
318 CFM |
229 CFM |
.650" |
321 CFM |
230 CFM |
PRC 247cc CNC Ported Cylinder Heads
Regular price $2,774.39 Save $-2,774.39Precision Race Components all new cylinder head castings completed with 247cc runners. For 408 cubic inch and larger applications with 4.03"+ bore sizing.
Click Here to SEE why we build better heads!
- 247cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- TSP Dual Spring Kit w/ PAC Springs Rated To .660" Lift
- 68cc CNC Machined Chambers
- CHE Bronze Guides
- 2.120" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!*
- ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***
No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 66 CFM | 57 CFM |
.200" | 147 CFM | 117 CFM |
.300" | 228 CFM | 170 CFM |
.400" | 282 CFM | 206 CFM |
.500" | 321 CFM | 227 CFM |
.600" | 343 CFM | 235 CFM |
.650" | 355 CFM | 241 CFM |
.700" | 360 CFM | 245 CFM |
PRC 237cc CNC Ported Cylinder Heads
Regular price $2,912.99 Save $-2,912.99Click Here to SEE why we build better heads!
- 237cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- TSP Dual Spring Kit w/ PAC Springs Rated To .660" Lift
- 68cc CNC Machined Chambers(call for different chamber size)
- CHE Bronze Guides
- 2.100" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!
- ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***
4.030" Flow Plate - No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 66 CFM | 57 CFM |
.200" | 147 CFM | 117 CFM |
.300" | 225 CFM | 170 CFM |
.400" | 284 CFM | 206 CFM |
.500" | 325 CFM | 227 CFM |
.600" | 334 CFM | 235 CFM |
.650" | 339 CFM | 241 CFM |
PRC 227cc CNC Ported Small Bore 3.9"-4" Cylinder Heads
Regular price $2,399.99 Save $-2,399.99Click Here to SEE why we build better heads!
Features:
- 227cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- Small Bore Chambers For Increased Horsepower & Torque+ SPECIFICALLY DESIGNED FOR 3.9"-4" BORE APPLICATIONS
- TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
- 62cc CNC Machined Chambers(call for smaller CC)
- CHE Bronze Guides
- 2.065" Intake / 1.600" Stainless Valves ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!!***
- Factory Rocker Friendly!!*
This 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!!
4.00" Flow Plate - No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 68 CFM | 56 CFM |
.200" | 145 CFM | 115 CFM |
.300" | 214 CFM | 167 CFM |
.400" | 261 CFM | 202 CFM |
.500" | 300 CFM | 219 CFM |
.600" | 322 CFM | 238 CFM |
.650" | 330 CFM | 236 CFM |
PRC 220cc 15-Degree CNC Cathedral Heads
Regular price $2,089.99 Save $-2,089.99Click Here to SEE why we build better heads!
Features:
- 220cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- Designed as a bolt on cylinder head with minimal change to pushrod length
- TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
- 64cc CNC Machined Chambers
- CHE Bronze Guides
- 2.045" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!*
- Extra Thick Deck Surfaces For Power Adders