PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads

All Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology!Click Here to SEE why we build better heads! MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE USA!! PRC's aftermarket casting LS3/L92/L99 cylinder heads come standard with the following options: NEW PRC 13-Degree Valve Angle LS3 Castings Improved Piston-to-Valve Clearance For Extra Compression & Larger Camshafts Smaller Than Stock Intake Port Volume For Improved Port Velocity Manley Stainless 2.185" Intake, 1.60" Exhaust Valves Billet Rocker Pedestals TSP .660" Dual Spring Kit w/ PAC Valve Springs, Titanium Retainers, Seats, & Seals CHE Bronze Guides Completely Assembled and Milled to Your Specifications 60-68cc Chambers All PRC cylinder heads are extensively researched and tested. The all-new PRC aftermarket casting LS3 cylinder heads are designed to flow considerably more than a gm ported casting while keeping the port sizes smaller for improved port v