ApplicationCompatible for Mazda RX7 FC FC3S 1986-1991Specification- Quantity: 2 pieces front + 2 pieces rear - Spring rate Front: 10 kg/mm (560 lbs/in) - Spring rate Rear: 8 kg/mm (448 lbs/in) - Adjustable Damper: 24 ways adjustable damper - Adjustable height: Yes - Adjustable camber plate: Yes - Color: Golden - Warranty: one year warranty for any manufacturing defectFeature- Adjustable ride height. - Adjustable pre-load spring tension. - 24 levels of adjustable damper - This allows you the ability to perfectly dial in your coilovers system. For a nice comfortable driving, set damping to full soft. For more spirited driving, set it to 16 clicks. For occasional track days, set it to full stiff. - 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. - Improve your handling performance without sacrifice comfortable ride. - A fast and affordable way to easily upgrade your car\'s appearance. - Easy installation with right tools. - Ideal for any track, drift and fast road and can also be used for daily.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.