Take advantage of a 2nd rear diff mount + Raise diff for better axle alignment + Solid bushings have near-zero flex or axle wind-up + More power transferred to the wheels + More direct and positive feedback and road feel + Eliminate the potential failure of stock bushings This bushing set covers the front bracket, rear mounts in subframe, and includes a new rear bracket with two upper mounts instead of the single-mount design used on the original. All mounts are either solid aluminum or a hybrid Delrin/aluminum that provides a more direct response and near-zero deflection compared to the factory rubber or urethane mounts. On race cars we prefer aluminum or Delrin to minimize deflection as much as possible. While urethane might be fine for street use they pale in comparison to solid when used on the track. Solid materials have almost zero wear and tear, eliminating another maintenance item from your prep list. The front mounts in this kit are offset 10mm higher than standard mounts. This raises the diff to better align the rear axle shafts with a lowered suspension. As you lower the ride height the angle of the rear axles becomes more extreme, which could cause premature failure in the CV joints. Raising the diff also helps with clearance between the ground and the diff cooling fins. Because of the solid nature of these bushings we only recommend them for track use. We do offer factory urethane and Powerflex urethane if you want a more street-friendly bushing option (but without the height correction). The new rear bracket includes a 2nd mount for the passenger side bushing. There is a place for the mount in the rear subframe but BMW chose not to utilize it. The KMP bushings do away with the factory vibration absorber on the upper bolt. New upper hex bolts are included. Note: front bushing bracket not included. The supplied bushings will need to be pressed into your existing bracket. A small amount of the casting must be ground off for clearance
Please enquire for accurate lead time/dispatch.