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.

Manufacturer: S&S Cycle

Part #: 900-0803