Powerflex Rear Roll Bar Mounting Bushes - 21.5mm for BMW E46 M3 PFR5-4609-21.5
This is where Powerflex Polyurethane bushes make a world of difference! They do not perish like rubber bushes. Powerflex Rear Roll Bar Mounting Bushes - 21.5mm. Powerflex Part Number = PFR5-4609-21.5.