Designed for all Harley Davidson transmissions such as evo s, twin-cams and the latest 6 speed cruise drives.  It dampens the transmission noise and helps to reduce the notorious shift clunk, whilst dramatically reduced the oil temperature in the gearbox.  The ShockProof feature provides cushioning between gear teeth.Dampens transmission noise (reducing the notorious shift clunk)Dramatically reduces oil temperatureFor all H-D transmissions like evo s, twin-cam s and the latest 6-speed cruise drivesSuitable for aftermarket versions, such as Baker, JIMS, S&S etc.ShockProof feature to provide cushioning between gear teeth1 Quart (0.94 Litre) Bottle