The Revshift M3 exhaust hanger insert is made from our 80A street hardness polyurethane. This part fits into the oem exhaust hanger. It prevents the hanger from sagging and eventually breaking. This will keep the muffler centered and level.
Fits oem part number 18201401797 - E36 M3 - E46 M3 - E9x M3 - E39 M5
