BDL, optional diaphragm balls clutch spring kit

With 7 x 5/16" carbide steel balls. Optional High Horesepower diaphragm clutch spring, complete with additional centrifugal force carbide steel steel lock-up balls. Used in combination with the stock balls of the clutch kit, for more extreme engine builds. Fits: > Optional for 588795 and 588796 Competitor balls clutches.