Blueprint Engines 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-H8002K--Notes: Straight Plug State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO