Powerflex Polyurethane Bush kit for Audi S3 Mk1 Typ 8L 4WD (1999-2003) Rear Diff Front Mounting Bush - PFR85-425BLK - This part replaces OE number 1J0599381A and fits into diff mounting bracket OE number 1J0599271D. - 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!