Vertex Cast Replica Piston Kit - Standard Bore 46.94mm 24279AManufactured in Italy, Vertex, the premier brand of OEM replacement pistons, is the OEM supplier to KTM and numerous European motorcycle and go kart manufacturers. Vertex offers enthusiasts state ofthe art, high quality pistons for nearly any powersport use from motorcycles and ATVs to marine and karting. Manufactured to the highest standards in Japan, Vertexs piston rings are produced by the OEM suppliers so that they are directOEM replacements.