Performance World 63240A LS3 Style Chevrolet 240cc Aluminum Cylinder Heads Pair (complete)

LS3 Style Chevrolet heads designed to fit Gen III LS1/2/6 3.90" bore engines. 240cc intake runners, 63cc combustion chambers. For hydraulic roller cams up to .625" lift. Assembled with Comp Cams 2.08"/1.60" valves, PAC beehive springs, and related hardware. Raised valve cover rails, 6-bolt per cylinder design (Fits LSX blocks too). Includes rocker arm rails for use with LS3 offset (OE style) rocker arms. SEE SPECIAL TECHNICAL NOTES REGARDING ROCKER ARMS. Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Pair. Download Data here - DOWNLOAD