Solo Werks S1 Coilover System - E46 M3 3 Series - Premium Entry Level Coilover Suspension! Features: Heavy Gold Zinc Plated Housings for superb corrosion resistance Large 20mm Damper Shafts New Progressive elastomer bumpstops Sway Bar End Links Black spring perches - double lock ring design Platform Specific Spring Rates and Matched Valving Front 20-40mm (0.8-1.5") Lowering Range Rear 20-40mm(0.8-1.5") Lowering Range 3 year Limited Warranty Each Kit Contains: 2x Front threaded coilover dampers (w/ Dual locking ring spring perches) 2x Front Main Spring 2x Front Sway Bar End Links 2x Rear (Twin-Tube Design) dampers 2x Rear adjustable spring perches 2x Rear springs (Progressive Rate) 2x Spanner wrenches Step by Step Installation Instructions 1oz. Bottle Boeshield T-9 Lubricant/Protection * A 5mm (min) front wheel spacer may be necessary depending on wheel size and offset INSTALLATION INSTRUCTIONS: Application / Fitments: BMW '98-'05 E46 M3 Coupe, Convertible *All lowering ranges are approx. and will varying depending on mileage, condition, vehicle options.