►Arctic cat

2012-15 Arctic Cat Torsion Spring Cap option that is used with our STM billet helix. It allows the use of the Arctic Cat torsion spring and has holes for spring load adjustment. No drilling or...

2012-15 Arctic Cat helix torsion spring cover for STM helix #99HXAC12. Includes: (6) 10-24 X 3/4 SHCS for fastening

Replacement quick change spider for the STM Rage 4 snowmobile primary clutch. Made from billet aluminum. Comes assembled complete with rollers and buttons.

Our billet cover is a rigid design made from 6061 aircraft aluminum. This design captures the towers of the movable sheave and helps stop them from spreading.  Our billet cover also allows the use of...

For the STM Rage 4 and 8 HD primary clutch only. This cover comes complete with bushing and snap ring.   Fits  STM Rage HD primary's 8-3/4" - 9-1/2" diameters 

Our billet cover is a rigid design made from 6061 aircraft aluminum. This design captures the towers of the movable sheave. Our billet cover also allows the use of the Ski-Doo TRA springs which...

Eight arm snowmobile quick-change spider comes complete with rollers, buttons and 1st stage arms. 

8 arm snowmobile screw-on spider. Comes complete with rollers, buttons and 1st stage arms. 

For the STM Rage 8 30mm screw-on and quick change post primary clutch. This cover comes complete with bushing and snap ring.

Z10 Stock Secondary Full Progressive STM Helix. Many angles available or custom angles are available for an additional fee (call for details).  The angles shown are equivalent to "STOCK" based...

Steel Washers set of 3 for STM Billet Roller Covers 

2016 STM Arctic Cat Team "Boss" Secondary Full Progressive STM Helix. Many angles available or custom angles are available for an additional fee (call for details).  The angles shown are equivalent...