This clutch kit was designed and tested to increase acceleration and backshift quicker than stock. Corner to corner on/off throttle response is quicker than stock. It gets rid of the lazy backshift in these sleds and makes them much more fun to ride in the twisties and bumps with very quick on/off throttle response. It was calibrated with up to 1.75" tracks, stock gearing or lower, and uses 412 ramps (stock in most 600etecs). Instructions are included for accurate pinweight adjustments for track lug height and elevation changes. Kit includes: Primary spring, Secondary Spring, Helix, and Dalton Pro adjustable pin kit. The kit is also available with a Shockwave Adjustable helix for more adjustability. Kit prices are $299.99 for standard helix, and $435.99 for Shockwave adjustable helix.