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! 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 Stainless Steel Hollow Stem 2.185" Intake Valves & Stainless Steel 1.60" Exhaust Valves Integrated Rocker Pedestals TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers CHE Bronze Guides Completely Assembled in the USA 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 velocity. The result is a cylinder head that is smaller than a stock GM LS3 port and moves more air than any other ls3 cylinder heads! The all new PRC aftermarket casting LS3 heads are the perfect option for customers looking for the ultimate in LS3/L99/L92 cylinder head technology The 13-degree valve angle will allow for the ability to run more compression and larger camshafts thanks to additional piston-to-valve clearance!! Lift Intake Flow Exhaust Flow .200" 157 cfm 117 cfm .300" 224 cfm 170 cfm .400" 279 cfm 205 cfm .500" 329 cfm 225 cfm .600" 360 cfm 235 cfm .650" 372 cfm 240 cfm .700" 380 cfm 243 cfm