300HP+ and racing supporting mods

STM tuner helix (specify application, only for STM secondary)

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 Pro stock turbo race sleds.   This secondary clutch...

STM Billet Primary clutch Rage 3WSP Screw-On 30mm 4-Stroke (New HD design) this clutch puts more power down than any stock clutch can with better belt durability This clutch comes uncalibrated. You will need to select either dalton clutch weights for...