KPMI, cast iron valve seat. 54.15mm OD

57-83 XL (intake) (NU)

Dimensions: 54.15mm/2.132" OD; 42.93mm/1.690" ID; 11.43mm/0.450" height. Replacement U.S.A. made cast iron valve seats from Kibblewhite Precision Machining for leaded and unleaded fuels including methanol and ethanol blends. All valve seats are in identical material and suitable for both intake as exhaust. Offers excellent thermal characteristics and resists micro-welding. With leading edge to ease installation. Note: Abbreviations used OD = Outside Diameter, ID = Inside Diameter.