PRC LS7x 265cc 7.0L CNC Head Porting

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"