Air Flow Research Cylinder Head - Magnum Comp - Assembled - 2.300 / 1.880 in Valves - 357 cc Intake - 121 cc Chamber - 1.625 in Springs - Angle Plug - Aluminum - Big Block Chevy - Pair-2010-TI--Notes: State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO