Complete handful of 4-shoe clutch system includes flywheel, lightweight moderate aluminum clutch footwear, silver (soft) clutch springs, installation screws, flywheel collar, and flywheel nut. The 4-shoe clutch design allows super-easy clutch developing from soft to difficult environment, each well suited for different track conditions and sporting design. The 4-shoe clutch features smaller, lighter inside elements, combined with the design enables more balanced clutch bell engagement set alongside the classic 3-shoe design. The 4-shoe design enables making use of combinations of various hardnesses of footwear and springs for clutch engagement environment, including permits several different pairs of footwear and springs provides ultra-fine engagement settings. You'll discover 4 different hardness of footwear and 3 different hardness of springs suggested. Changing the surroundings is easy because of the initial installation screws that keep carefully the footwear and springtime. SOFT clutch environment creates the most amount of traction and engages earliest; MODERATE clutch developing enables more clutch slippage and partcipates in the end; INVOLVED clutch developing engages latest and even more revs to engine. Optional graphite footwear engage more efficiently and offer smoother clutch acceleration. Is needed with 3BB clutch bells #358413 or #358413-L simply.