Application2003-2007 compatible for Mazda Mazda6 / mazdaspeed6 all modelSpecificationQuantity: 2 pieces front + 2 pieces rearSpring rate Front: 9 kg/mm (504 lbs/in)Spring rate Rear: 9 kg/mm (504 lbs/in)Adjustable Damper: Non adjustable DamperAdjustable height: YesAdjustable camber plate: NoColor: GoldenWarranty: one year warranty for any manufacturing defectFeature* 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.Note* 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.