2010-2012 Arctic Cat 450 H-1 models, 2011-2012 Arctic Cat 425 4X4, 2013+ Arctic Cat 500, (and 2011-2012 Kymco MXU 450.) Stock and...

'07+ 650/700 Prowler XT -oversized tires For '07 & newer Prowler models (with new torsion style secondary clutch) use part # DA-650...

The popular Arctic 650/700 H-1 is calibrated fairly well for general use with stock tires, but oversized tires have a very negative...

Oversized tires/High elevation Arctic’s flagship H-2 4x4 model is a powerhouse in stock form. This simple clutch re-calibration helps...

This kit combines our popular plain/purple secondary clutch spring with the blue primary. This cost-effective combination has proven most...

New version with complete roller assemblies A new kit that contains complete drop in roller assemblies. This kit is designed to...

This optional primary spring has slightly higher engagement than the Blue spring in the DKA6570MT kit, but also has stronger compressed...

The DPSS-AQ (Aqua) secondary spring is popular with the 28" and bigger tires for mud applications. For more case-specific info on...

This complete clutch recalibration helps recover power lost from oversize tires. A slightly heavier secondary spring and roller system...

Not for H-1 Arctic engine models Click Here to watch the Video! Improved acceleration and backshifting and maintains more consistent RPM...

Not for H-1 Arctic engine models This new version of our proven DSK700EF kit now comes with "complete roller assemblies." Complete...

A kit designed for increased acceleration and backshifting when using big mud tires. Also aids in recovery of power lost at high...