Powerflex Polyurethane Bush kit for BMW E46 3 SERIES (1999 - 2006) Rear Diff Front Mount - PFR5-4621 - OE Number 33172282484. - Fits E46 M3 and Z4M models only - Bush Size: - PRICE IS PER CAR KIT, NOT per bush. Powerflex usually price their bushes singly, but we have combined the QTY and price to keep it simple for you!