STM

Arctic Cat style secondary spring for STM Secondary Clutches 

STM tuner helix (specify application, only for STM secondary)   46/36

STM tuner Secondary clutch (11.25") for High HP application. -Much better belt durability -Much better performance both on trail and at race track. -BOTH STM clutches are on all our Pro mods and...

STM torsional Helix for STM torsion conversions

Product Description 2012-13 Arctic Cat Torsion spring cap option that is used with the STM billet helix's. Allows the use of the Arctic Cat torsion spring and has holes for spring load...