Refer to the Comet tuning manual to help select the proper profile
To determine the proper cam arm weight for a 108 4-PRO clutch (four cam arms), use the following formula: Weight of recommended 108-EXP cam arm (from Applications) x .855 = recommended cam arm weight for 108 4-PRO
All cam arms are sold each
Bushings are easily removable for clutches that require it
NOTE: 102-C, 108-C and 108-EXP clutches all use the same basic cam arm. However, the 1993 108-EXP clutch does not use cam arm bushings. You need only to push the bushings out of any of the current cam arms, which all include them. 1994-present 108-EXP and 108 4-PRO clutches use cam arms with bushings like the 102-C and 108-C.