Add to Cart Compare Quick view STM ProCross 800/Polaris Rush/Apex-Z1 Conversion Driven Torsion Upgrade MSRP: Now: $95.00 Was: Torsion spring cap option that is used with our STM billet helix. Allows the use of a torsion spring and has holes for spring load adjustment. No drilling or modifications to the driven are needed. Does not come with helix or spring... MSRP: Now: $95.00 Was: Add to Cart Compare Quick view
