This Wheel Kit bolts into tunnel in order to eliminate unwanted track slap. Kit mounts between the suspension and track allowing the wheel kit to pick up on the track and deflect it away from the suspension. Be sure that you mount it high enough to keep suspension from bottoming out into it. Kit includes shaft with spacers, two 2 3/4” idlers and fasteners. Kits are available in six lengths. Custom lengths available upon request.