Powerflex Polyurethane Bush kit for Porsche 996 (1997-2005) Rear Upper Link Arm Outer Bush - PFR57-508 - On some early 997 models (pre 2006) there is no supporting lug on the upright to the outside faces of the outer bushes. For these models use 4 x PFR57-508 outer bush & 4 x PFR57-509 for the inner bush. For cars with lugs use 8 x PFR57-509. - 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!