Tein VSM74-C1SS3 Flex Z Coilover Kit for Mazda MX-5 Front - Ride Height Adjustment: -40mm/Spring Rate: 7 kg/mm (392 lbs./in) Rear - Ride Height Adjustment: -30mm/Spring Rate: 5 kg/mm (280 lbs./in) 16-level Linear Damping Force Adjustment System Ride height adjustable shock absorber Highly-Rigid Bracket & Shell Case