PRC LS7x 265cc 7.0L CNC Head Porting

Regular price $949.99 Save $-949.99
99 in stock
These are for customer supplied cylinder heads. We are not supplying castings! This is porting, valve job, and milling only!

Precision Race Components LS7 CNC 265cc ported cylinder heads.  Fully CNC ported LS7-based cylinder heads! (All New GM LS7 Cylinder Head Castings)

  • Based off PRC's CNC Ported LS7 Heads
  • 2.200"/1.610" Valves (base price for exchange includes new stainless exhaust valves)
  • Available with PRC Double Spring Kit Complete With PRC Double Springs, Titanium Retainers, Seats, & Seals
  • Completely Assembled & Setup To Your Specs!!
  • Available With Stainless, Hollow Stems, or titanium valves!
Extensive CNC & dyno testing has resulted in one of the most affordable & 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 & airflow.  The PRC LS7 cylinder head is available with standard stainless exhaust valves and titanium intake valves.

 

Flow Data:  @ 4.125" Bore Plate  Superflow 600
   

LS7 
Intake

 LS7 Exhaust   PRC 265cc 
LS7 Intake
  PRC LS7 Exhaust
 .200  161  114  169  119 
 .300  227  171   248  179 
 .400  291  193   308  211 
 .500  330  203  351  224 
 .600  351   209 383  235
 .650  353  204 388  241
 .700  353  209 393  246


**If stock valve guides are damaged or badly worn, there is an additional $150 fee to replace them.
**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.