Complete set of 4-shoe clutch system includes flywheel, lightweight medium aluminum clutch footwear, gold (soft) clutch springs, installation screws, flywheel collar, and flywheel nut. The 4-shoe clutch design enables super-easy clutch establishing from soft to hard setting, each suited to different track conditions and sporting design. The 4-shoe clutch features smaller, lighter interior components, and the design permits more balanced clutch bell engagement set alongside the traditional 3-shoe design. The 4-shoe design allows usage of combinations of different hardnesses of shoes and springs for clutch engagement environment, as well as allows for a mixture of different pairs of footwear and springs which gives ultra-fine engagement settings. You can find 4 various hardness of shoes and 3 different hardness of springs recommended. Changing the setting is very easy thanks to the special assembly screws that support the footwear and spring. SOFT clutch setting generates the greatest number of traction and engages earliest; MEDIUM clutch setting enables more clutch slippage and engages later on; INTENSE clutch setting engages latest and provides more revs to engine. Optional graphite shoes engage more efficiently and present smoother clutch acceleration. Must be used with 3BB clutch bells #358413 or #358413-L only.