Miata springs come in several rate and height choices as further explained in the Miata spring product descriptions below. In general, the Progress Miata springs have proven most popular here with Miata street drivers for many years thanks to their combination of reasonable cost, mild rate increase, and mild lowering. The higher rate RoadsterSport Miata spring kits have proven most popular with the track users and customers who have the stock Bilsteins (or those adding KONI Sport shocks). Our Supercharged RF shown here with KONI Sport Shocks and our exclusive Progress RF Miata Springs and 17x8 Konig Ampliform Miata Wheels. If your factory shocks have over 40,000 miles they are worn out, don't install new springs on ancient worn out shocks, start any new set of springs with FRESH set of shocks and fresh set of bumpstops.
