This assemble cylinder head kit fits Honda GX160 GX160D GX160H1 GX160H2 GX160K1 GX160RT1 GX160RT2 GX160T1 GX160T2 GX160U1 GX160U2 GX160UD GX160UH2 GX160UT1 GX160UT2 5.5hp engine and power equipment with GX 160 engine. It contains all parts you need, including Honda GX160 head,valve cover, valves,valve spring,spark plug,insulator, head gasket, valve cover gasket, carburetor gasket set, muffler gasket, all studs,bolts, nuts and others as picture.