BMW Z4 E85 & E86 (2003 - 2009)Rear Shock Top Mount Bracket and Bush 12mmSuits cars with aftermarket rear shock absorber with a 12mm pin. Will not fit E36 and E46 Cabriolet models. Suspension Brand (Rear Shock Absorber Shaft Diameter) - Original BMW (10mm), AST (10mm), Bilstein HD, Sport, PSS Coilovers (10mm), FK Coilovers (10mm), H&R Coilovers (10mm), JRZ RS (12mm), Koni Sport (10mm), KW V1, 2, 3 (10mm), ST Coilovers (10mm), Tein Coilovers (12mm). The above list is meant as a guide only. If your shock absorber brand is not listed, measuring the OD of the shaft will determine whether PFR5-5630-10 or PFR5-5630-12 should be fitted.Bush Size: 12mmOEM Part Numbers: 33521092362, 33526779670, Quantity: 2 Bush(es) / Required per Car = 2 Bush(es)Road Series Part Number = PFR5-5630-12Black Series Part Number = PFR5-5630-12BLKRoad EAN Reference Number: 5055676528421, Black EAN Reference Number: 5055676528438Diagram Reference = 30NOTES:-See above pictures and car diagrams as applicable.Road Series - For Road and fast Road use. Improve your cars’ road holding and chassis performance by controlling the amount of unwanted flex in the suspension. They offer Prolonged tyre life, Improved performance, Increased safety, Greater cost-effectiveness.Black Series- For Track and Motorsport use. Manufactured using Black 95 Shore A compound to provide maximum control of chassis geometry. They are designed for the Track, ready to Race and are engineered to be the best.Fitting Instructions: Road Series - Black Series