Electric pto clutch upgrade kit for all Onan powered models as well as 21-23hp Vanguard powered tractors (1-1/8" crankshafts). Includes the later design Warner TG2000 series clutch which has a higher torque capacity than the factory original. A higher torque capacity affords less slippage under maximum load which translates into less heat buildup and longer life. Note: If you do not have a muffler heat shield kit installed between the underside of the muffler and clutch, there is no warranty on this item. See part number C45776 for the kit per Ingersoll service bulletin #94-3.