Powerflex Polyurethane Bush kit for MG ZR Engine Mount Stabiliser (Small) - PFF63-419BLK - PFF63-418 and PFF63-419 suit both the Upper and Lower engine stabilisers, hence why it is listed as 2 per car for each bush. If fitting this to a diesel engined vehicle, an increase in noise and vibration is to be expected. This should be considered as a performance upgrade, not a standard replacement. - 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!