Application: for Porsche Cayenne 2002-2010 955 & 957 body Specification: Quantity:2 pieces rear Adjustable height: lowering 1-3inch Damping: non-adjustable Top mount: pillow ball Spring rate Rear: 8 kg/mm (448 lbs/in) Spring length Rear: 180mm Coilover overall length Rear: 490mm-550mm Shock type: Twin tube Spring Preload: 7-10 mm Warranty:2 year warranty for any manufacturing defect Feature: 1. Full length height adjustable---lower your car 1-3 incheds to get performance ride 2. Adjustable camber ( for some models) 3. Independent Ride Height and Spring Pre-load Adjustments 4. Twin-Tube System for Comfortable Ride on Streets 5. Coated finish to avoid rust 6. Weight Saving Aluminum Components And heavy duty Steel Lower Mount Brackets 7. Simple install, Easy to adjust. Notice : - Hi-performance aftermarket parts; Instruction Included. (If not, we could offer you the E-book version. ); professional installation is suggested. - Please feel free to contact us for whatever we can help;