Cylinder Head - Pro1 LS 15 Degree - Assembled - 2.165 / 1.600 in Valve - 280 cc Intake - 68 cc Chamber - 1.295 in Springs - Aluminum - GM LS-Series - Each
Cylinder Head - Muscle Series - Assembled - 2.020 / 1.600 in Valves - 195 cc Intake - 64 cc Chamber - 1.437 in Spring - Straight Plug - Aluminum - Small Block Chevy - Pair