Venom Products AC960045 Twin Trax Helix for Tied Clutch - 66 x 64

For Tied Clutch on 2012-15 Arctic Cat.
1st Track - 66ER, Type - .56F.
2nd Track - 64ER, Type - .54F.

Developed to produce a quick upshift and improved backshift for excellent throttle response. Dual-angle-option helix offers fine-tunin for changing conditions. Available in a variety of multi-angles for almost any application. ER helixes are for Ski-Doo and Polaris machines with engine reverse. Helixes for TIED8 and TSS-04 clutches are NOT interchangeable. Type Example:Type F = full progressive; type .46 = .46 progressive. Sold each.