Combination of the Sport Utility, Mudder, Sand Dune and Rock Crawler Kits Allows you to fine-tune for any tire size and any elevation Works great if you ride in different areas or change tire sizes Allows you to adjust for motor mods and tire changes in the future Includes adjustable weights with 2 different sizes of magnets, 2 primary springs, 2 secondary springs and a custom cut helix (unless noted). CLUTCH KIT PRO POLARIS