Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 85.50mm - Size +.020 - CR 9.5 - Single Piston

Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strengthArmorGlide? Skirt Coating: seizure resistant, friction reduction, and quieter operationFully machined crown featuresPrecision ring grooves, anti-detonation groove, and additional ring seal improving featuresForced pin oilingDesigned and built to withstand heavy to severe duty performance applications