Solo Werks S1 Coilover System – A4 Sedan 2wd & Quattro (B6/B7) – Premium Entry Level Coilover Suspension Lowering Ranges:Front 40-80mm(1.6-3.35″)Rear 40-80mm (1.6-3.35″) Features at a Glance:3-Year Limited WarrantyWarrants against Construction and Component DefectsHeavy Gold Zinc Plated HousingsSuperb Corrosion Resistance, Salt Spray tested 500 HoursTwin Tube Shock DesignGas Charged, Fixed Dampening, Independent Valves, App Specific TuningHigh Tensile Chrome Silicon Wire SpringsLight Weight, Less Stress, More Travel, PowdercoatedHardened Chrome Piston RodsMirror FinishedElastomer BumpstopsMicro Cell Poly, Progressive Rate, Long Life SpanHeight Adjustable Rear Perches DualAnodized Black Aluminum, Inc. SpannersKit Contents:2x Front threaded coilover dampers2x Front Main Spring + 2x helper spring2x Rear dampers2x Rear adjustable spring perches2x Rear springsSpanner wrenchesStep by Step Installation Instructions1oz. Bottle Boeshield T-9 Lubricant/Protection