PRC LS7 RECTANGULAR PORT
265cc, 285cc, 265cc Small Bore
The Precision Race Components 265cc and 285cc LS7 cylinder heads are the pinnacle in high horsepower LS-based cylinder head performance for your LS7/LSx engine! Flowing up to 54 cfm intake and 37 cfm exhaust more than the factory LS7 CNC ported cylinder heads, you can achieve 393 cfm with our 265cc and 407 cfm with our 285cc cylinder heads for your street-driven vehicle! The 265cc cylinder heads will require a minimum bore size of 4.10”, while the 285cc cylinder heads will require a minimum bore size of 4.125”. We also offer a 265cc small-bore configuration for customers looking to install LS7 cylinder heads on bore sizes as small as 4.065”, such as an LS3. We do recommend the small-bore LS7 cylinder heads for engines with at least 4.00” stroke due to the intake runner size and overall port shape. Like our other PRC aftermarket castings, they will come standard in 6-bolt configuration with thicker deck surfaces, which make them an excellent choice for any power-adder application. The standard valve material will include hollow-stem stainless steel intake and stainless steel exhaust, but we do offer an intake upgrade to titanium and exhaust upgrade to hollow-stem stainless steel to further reduce the overall valvetrain weight. We do upgrading to the titanium intake valves if you are running over .630” total valve lift. Whether you are looking to achieve 600+ rear-wheel horsepower in a naturally-aspirated build or 1,500+ horsepower in a forced induction application, the PRC LS7 cylinder heads will be an excellent choice!
CAST IN THE USA! MACHINED IN THE USA! MADE IN THE USA!