Stock Primary Upgrade and Billet Components

This is a .090 spider shim for the 2010-2014 stock Arctic Cat Primary Clutch.

2010-2013 Four-stroke Arctic Cat .130 spider shim.

STM replacement spider nut for stock Arctic Cat 2010-15 models. Uses STM tool part number  4001045 or 1 7/16" socket.   1 1/4" - 12 

These are designed for the wide roller team primary in the Arctic Cat Snowmobiles.  New improved profile that provides a harder up shift than the Original Supertips. We are very pleased with testing results on the race track and chassis Dyno this...

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 offers a wider variety of spring rates to choose...

This spacer is needed when using the STM 3 arm TRA cover on stock Arctic Cat Primary.