Powerflex Polyurethane Bush kit for Citroen Berlingo (2008-on) Front Arm Front Bush - PFF50-601 - This part is a replacement for OE number 3523.91 - 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!