All Balls Racing – CV Boots & Boot Kits, including standalone CV boots for 8-ball axle joints and complete boot kits such as the 2016 Polaris 450 HO 2x4 MD rear inner 8-ball boot kit. A boot is the cheapest part on a driveline and the one that decides whether the joint behind it lives or dies. Once the rubber tears, grease slings out, water and sand get pumped in, and a joint that was fine yesterday starts clicking on turns and grinding under load within a few hours of riding. These kits include the boot along with the clamps and grease needed to do the repair correctly, using thick, flexible material that tolerates the operating angles and heat a lifted or hard-worked machine sees. Catching a split boot early and replacing it means you keep the axle instead of buying a new one, and the driveline stays quiet and vibration-free. Doing the boot with new clamps and the right grease volume matters, since a loose boot tears again fast. Inner and outer boots differ, and joint ball counts vary. Tell us your machine and which end of the axle you are working on and we'll confirm the right CV boot kit before you order.