Cylinder Head - Super Cobra Jet - Bare - 2.020 / 1.760 in Valves - 290 cc Intake - 72 cc Chamber - Aluminum - Big Block Ford - Each

Cylinder Head - Performer RPM - Assembled - 2.020 / 1.600 in Valves - 185 cc Intake - 54 cc Chamber - 1.550 in Springs - Angle Plug - Aluminum - AMC V8 - Each

Cylinder Head - Performer RPM - Assembled - 2.020 / 1.600 in Valves - 185 cc Intake - 54 cc Chamber - 1.550 in Springs - Angle Plug - Aluminum - AMC V8 - Each

Cylinder Head - Performer RPM - Assembled - 2.150 / 1.680 in Valves - 218 cc Intake - 77 cc Chamber - 1.105 in Springs - Aluminum - Oldsmobile V8 - Each

Cylinder Head - Performer RPM - Assembled - 2.150 / 1.680 in Valves - 218 cc Intake - 77 cc Chamber - 1.105 in Springs - Aluminum - Oldsmobile V8 - Each

Cylinder Head - BB-2 Plus - Bare - 2.250 / 1.880 in Valves - 312 cc Intake - 119 cc Chamber - Angle Plug - Aluminum - Big Block Chevy - Each