Ferrari 456 (1992 - 2003) Rear Upper Wishbone Inner Bush - PFR17-611 PFR17-611 increases radial stiffness by 17% using the combination of a 95A durometer polyurethane bush, with plated machined outer shell, stainless inner sleeve, and supporting washers, providing a premium engineered, high-performance alternative to the OE rubber equivalent. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!