The Ultimate clutch includes 2 diaphragm springs, spring collar, 12 springs and shoulder bolts BDL's High Performance clutch lets you choose between a diaphragm or coil spring application Kit will fit any BDL belt drive open or closed Stock applications can use as few as 4 springs or the black diaphragm For more spring pressure use the copper color diaphragm High Performance applications use both diaphragm spring or use 8 to 12 springs depending on individual application Note - To achieve the proper spring tension for your application, you can add or subtract springs.

Start with 6 or use any combination up to 12 springs.

Most high performance applications will only need 8 or 9 springs.