PRC LS7x 285cc E85 68cc CHamber, CNC Ported 400+CFM Heads with .700" MAX Lift Package

Precision Race Components LS7 CNC 285cc ported cylinder heads.  All new 6-bolt Precision Race Components LS7 cylinder heads! MADE in the USA!! CAST in the USA!! MACHINED in the USA!!Click Here to SEE why we build better heads! 2.245" Titanium Intake Valve / 1.610" Inconel Exhaust ValveTSP .700 MAX Lift Spring Kit w/ PAC Valve Springs & PAC Mini 8 Titanium Retainers6-Bolt Cylinder Heads with Thicker Deck SurfaceCHE Bronze GuidesWill Work on Both Standard GM 4-Bolt &  Aftermarket LSx / RHS 6-Bolt Style Engine BlocksCompletely Assembled in the USADesigned for the customer pushing High RPM, High Compression, E85 or Solid Roller Cam Extensive CNC and dyno testing has resulted in one of the most affordable and powerful LS7-based cylinder heads available! Flowing up to 53 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow! The 285cc runner is recommended for higher HP applications with a minimum bore size of 4.125".