Twin Trax Helix for Tied Clutch - 80-64 x 81-61

Developed to produce a quick upshift and improved backshift for excellent throttle responseDual-angle-option helix offers fine-tunin for changing conditionsAvailable in a variety of multi-angles for almost any applicationER helixes are for Ski-Doo and Polaris machines with engine reverseHelixes for TIED8 and TSS-04 clutches are NOT interchangeableType Example:Type F = full progressive; type .46 = .46 progressiveSold each1st Track - 80-64, Type - .46 Progressive 2nd Track - 81-61, Type - .46 Progressive Helix for Tied Clutch (except 12 Arctic)