These S&S® CNC ported B3 cylinder heads are original equipment on S&S® T143 engines. They are set up for 4.425" bore and are machined for the S&S® 4-3/8" cylinder stud pattern. Kit includes front and rear head assemblies complete with S&S® .650" lift valve springs, and 2.200" intake and 1.800" exhaust valves, head gaskets, base gaskets, exhaust gaskets, and head bolts. Wrinkle black powder coat finish.
NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE ON ANY EPA POLLUTION CONTROLLED MOTOR VEHICLE.