maXpeedingrods B3 is based on B2 coil-overs, which are also height adjustable. They are also made for street use, but the 24-level rebound damping control allows you the ability to perfectly dial in your coil-over setup. You will experience better ride quality in all road conditions. Applications For Mazda MX-5 MK1 (NA) (09/1989-04/1998) For Mazda MX-5 MK2 (NB) (01/1998-10/2005) For Mazda Miata MX-5 NA (1.6L,1.8L) 1989-1997 For Mazda Miata MX-5 NB (1.6L,1.8L) 1998- 2005 Specifications Height adjustable: Yes, lowering 25-75mm depending on the vehicle models Damping adjustable: Available, 24 levels of rebound damping force Spring Rate Front: 7 kg/mm (392 lbs/in) Spring Rate Rear: 6 kg/mm (336 lbs/in) Front spring inner diameter: 70.5 mm Rear spring inner diameter: 70.5 mm Spring length Front: 180 mm Spring length Rear: 160 mm Spring Preload advised: 7-10 mm Front top mount: Pillow ball Rear top mount: Pillow ball Camber adjustable: Not available Package included 2x Front coil-overs 2x