SBT sells the motor on a rebuildable core exchange basis. Visit Program Description for further details. This is a Standard remanufactured Kawasaki piston port induction 550 engine. It includes the cases, cylinders, trued and welded Crankshaft, head, all new internal parts & a woodruff key. 1991 and up models must call for availability Installation Gasket Kit required. Please call SBT for shipping rates At this time the item you are selecting is sold on a cores first basis, please refer to our Program Description on sending the correct components to SBT. The lead time average for turn around is approximately 10-15 business days. Once SBT receives the core, this core has entered the remanufacturing process and cannot be returned.