Performance World 63171 SB Mopar 171cc Cylinder Heads pair (bare)

SB Mopar 171cc Bare Aluminum Cylinder Heads. 63cc Combustion Chamber. CNC pocket ported. PW 2.02" intake, 1.60" exhaust valves included. Manufactured from A356-T6 aluminum. Each pair comes with a detailed flow sheet. Ready for assembly and sold as pairs. Note: Will not work on '68-'71 340 engines using OE pistons - positive deck. Download Data here - DOWNLOAD Download Installation Tech here - DOWNLOAD