Application for Mazda 3 BK 2004-2009 for Mazda 3 BL 2009-2013 (Includes Mazdaspeed 3) Specifications Quantity: 2 piece front + 2 pieces rear Height adjustable: lowering 25-75mm depending on the vehicle models Damping: Not adjustable Spring Rate Front: 10kg/mm (560 lbs/in) Spring Rate Rear: 7kg/mm (392 lbs/in) Spring length Front: 200 mm Spring length Rear: 194 mm Spring Preload advised: 7-10 mm Camber: Not adjustable Feature 1. Self-design structure and new manufacturing system to give more customers good coil-overs without breaking the bank. 2. Height adjustable---lower your car 1-3 inches (depending on vehicle models) to get a performance ride 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. Heavy Duty Steel Lower Mounts 7. Simple install, easy to adjust. Notice 1. All modifications must be installed by licensed mechanics and in compliance with your local modification regulations. 2.