10-SC550 KPMI, cast iron valve seat. 54.97mm OD

Kibblewhite cast iron valve seats are essential for any Shovelhead top-end rebuild. These U.S.A.-made seats are designed to handle the stresses of modern fuels, including unleaded and ethanol blends. This seat features a 54.97mm outside diameter and a 44.45mm inside diameter, specifically sized for the intake side of 1966 to 1984 Shovelhead engines. The cast iron material is identical for both intake and exhaust use, providing consistent thermal expansion and excellent resistance to micro-welding. A leading edge is machined into the seat to facilitate a smoother installation into the head. These seats are sold individually, providing a professional-grade solution for riders looking to keep their classic Shovelhead on the road for years to come.