Cylinder Head - Performer RPM - Assembled - 2.165 / 1.650 in Valve - 202 cc Intake - 83 cc Chamber - 1.300 in Springs - Aluminum - 5.7 L - Mopar Gen III Hemi - Each

Cylinder Head - LS1 Mongoose Strip - Assembled - 2.080 / 1.600 in Valves - 230 cc Intake - 62 cc Chamber - 1.270 in Springs - Angle Plug - Aluminum - GM LS-Series - Pair

Cylinder Head - Assembled - 2.165 / 1.570 in Valves - 246 cc Intake - 69 cc Chamber - Angle Plug - Aluminum - GM LS-Series - Each

Cylinder Head - Bare - 2.165 / 1.570 in Valves - 246 cc Intake - 69 cc Chamber - Angle Plug - Aluminum - GM LS-Series - Each

Cylinder Head - Assembled - 2.000 in/1.570 in Valves - 211 cc Intake - 71 cc Chamber - Aluminum - GM LS-Series - Each

Cylinder Head - Assembled - 2.165 in/1.590 in Valves - 258 cc Intake - 69 cc Chamber - Aluminum - GM LS-Series - Each