ApplicationCompatible for Mazda Mazda6/ mazdaspeed6 all model 2003-2007SpecificationQuantity: 2 piece front + 2 pieces rear Spring rate Front: 9 kg/mm (504 in/lbs) Spring rate Rear: 9 kg/mm (504 in/lbs) Damper: 24 ways adjustable Damper Adjustable height: Yes Adjustable camber plate: No Warranty: one year warranty for any manufacturing defect Feature* Adjustable ride height * Adjustable pre-load spring tension * Pillow ball top mount -- this design helps combat noise while tuning. It also improves the steering feel and response * Most components are made from 6061 aluminum with T6 for increased hardness -- the advantages include excellent strength, and aluminum helps keep the weight down. * Hi Tensile performance spring - Under 600,000 times continuously test, the spring distortion is less than 0.04%. Plus, the special surface treatment is to improve the durability and performance. * All inserts come with fitted rubber boots to protect the damper and keep clean. * A fast and affordable way to easily upgrade your car\'s appearance. * Easy installation with right tools.Notice* No instruction included; Professional installation & alignment suggested. * Please check our store for other auto parts you may be interested in. * Please feel free to contact us for whatever we can help