This is the Cylinder Head for the O.S. Max 75AX Engine, (OSMG0575). FEATURES: Replaces damaged cylinder heads One-piece aluminum construction with brass gasket insures tight fit with crankcase INCLUDES: One heatsink head for the O.S. Max 75AX engine One brass washer REQUIRES: Installation on the 75AX engine tlw 9/12/07 ir/jxs