Porsche 911 964 (1989 - 1994) Rear Suspension Spring Plate - PFR57-107 PFR57-107 Rear Suspension Spring Plate is a direct bolt-on replacement for Porsche 911 964 rear axle struts that comprises a motorsport grade spherical bearing, polyurethane support bushes and bearing seals, zinc plated spring steel plates spec'd to the same grade as OE and stainless steel CNC machined sleeves and eccentric adaptors. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!