This 3pc. CNC aluminum gold anodized bushing set replaces the two rear diff cover and single OEM subframe diff mounts on the E46 M3. We sell a different Non-M bushing set as well for all other 3 series. Check the gallery for install images. ~Solid diff bushings will increase rotational drivetrain noise, but will eliminate clunking and noise from worn rubber bushings. These are a slip fit installation and may require epoxy due to variation in the stamped subframe mount.