BMW 7 Series E38 (1994 - 2002) Rear Diff Front Mounting Bush - PFR5-524BLK This part fits against a flat casting face of the diff. If the casing has a spigot use PFR5-525. This part is fitted to the M5 as well as other models. Check OE part number. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!