HHP-4 BDL, optional diaphragm balls clutch spring kit. 150HP

This BDL optional diaphragm balls clutch spring kit is the ideal upgrade for high-performance Harley builds reaching up to 150 horsepower. Designed for use with 588795 and 588796 Competitor balls clutches, this kit includes a heavy-duty diaphragm spring and seven 5/16-inch carbide steel lock-up balls. These components work with your existing clutch balls to increase centrifugal force and prevent slipping under load. It is a necessary addition for riders who have moved beyond stock power levels and need a more aggressive clutch engagement. For even more extreme builds over 180 horsepower, consider the 590772 kit instead. This assembly is sold as a kit.