Air Flow Research Cylinder Head - Enforcer - Assembled - 2.020 / 1.600 in Valves - 185 cc Intake - 59 cc Chamber - 1.290 in Springs - Angle Plug - Aluminum - Small Block Ford - Each-1351--Notes: 20-Degree Valve Angle, Sold as single head State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO