10-SC541 KPMI, cast iron valve seat. 54.15mm OD

For the Ironhead Sportster enthusiast, these Kibblewhite cast iron valve seats offer the durability required for high-heat applications. Made in the U.S.A., these seats are engineered to withstand leaded and unleaded fuels, as well as methanol and ethanol blends. This specific seat is sized with a 54.15mm outside diameter and a 42.93mm inside diameter, making it the correct choice for the intake side of 1957 to 1983 Sportster models. The cast iron material is chosen for its excellent thermal properties and its ability to resist micro-welding under load. To make installation easier, each seat features a machined leading edge for a better press fit. These high-quality replacement seats are sold individually.