Precision Race Components LS7 CNC 265cc ported cylinder heads. Click Here to SEE why we build better heads! MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE USA!! 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 2.200"/1.610" Valves TSP .660" Dual Spring Kit w/ PAC Springs, Retainers, Seats, & SealsSprings, Titanium Retainers, Seats, & Seals CHE Bronze Guides Completely Assembled & Setup To Your Specs Available With Stainless Steel, Hollow-Stem, or Titanium Intake Valves Extensive 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!The 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! 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 **Valve spring lift ratings are based on using titanium intake valves.
