Notice: No Top Mount Included, Modification Required If You Use OE Top Mount Application: for Mazda MX-5 NA MK1 1989.04-1997 Miata Specification: Height adjustable: Yes, lowering 0-25mm depending on the vehicle models Damping : fixed damping Top mounts: Front and rear OE top mounts required Main spring Rate Front: 6 kg/mm (336 in/lbs) Main spring Rate Rear: 6 kg/mm (336 in/lbs) Main spring length Front: 170 mm Main spring length Rear: 170 mm Helper spring rate Front: 1 kg/mm (56 lbs/in) Helper spring rate Rear: 1 kg/mm (56 lbs/in) Helper spring length Front: 102 mm Helper spring length Rear: 102 mm Spring Preload advised: 7-10 mm Shock type: Twin tube Package included 2x Front coilovers 2x Rear coilovers 2x C spanners Feature: 1. 0-25mm(depends on vehicle models) lower height adjustable 2. Dust boot, solid rubber bump stops 3. Weight Saving Aluminum Components And heavy duty Steel Lower Mount Brackets 4. Simple install, Easy to adjust. 5. Use the vehicle's original upper mounts (not