This step shim will be required when installing the STM weights part# 16 72AXEZ1-3 into your stock Arctic Cat primary clutch. It has .030 belt shim and .150 spider shim.
No warranty on Nitro 1000 or Ski-Doo Triple motors as we do not recommend running these clutches on them.
Available for all OEM tapered crankshafts. Available in several d
