This is the Cylinder Head (without valve assemblies) for the O.S. Max FS-120 Surpass III Engine (OSMG0935). The cylinder head bolts to the top of the crankcase and houses the intake and exhaust valve assembly and the glow plug. FEATURES: Replaces damaged cylinder heads. Constructed of aluminum with brass alloy insert valve seats. INCLUDES: One Cylinder Head for the O.S. Max FS-120 Surpass III Four Stroke Engine with two cylinder head gaskets. REQUIRES: Installing intake and exhaust valve assemblies, rocker cover, intake manifold and glow plug. Bolting to crankcase with O.S. screw set #45513010 (OSMG8817). COMMENTS: For cylinder head with valve assemblies, use OSMG5237. This cylinder head will not work in the FS-120 Surpass I or II JXS 1/08/02 ir/kh