Powerflex Polyurethane Bush kit for Citroen C4 (2004-2014) Front Arm Rear Bush - PFF50-402BLK - This part is a replacement for OE number 3523.77 and 3523.92 - 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!