RHS Pro Action 23° Cast Iron 220cc Small Block Chevrolet Cylinder Head with 64cc Chambers #12322

New Racing Head Service Pro Action 23° Cast Iron Cylinder Head for a 1955-86 Small Block Chevy V8 Engine. 220cc Intake Runner, 64cc Combustion Chambers, Angled Spark Plug Design. Bare casting that has been fully machined for 2.020 /1.600 valves, .708" reach tapered seat spark plugs, and up to 1.550" diameter valve springs. Designed for street performance, drag racing & circle track applications. RHS Part #12322. 222