All figures here for SOFT TOP version of MX5 Progress Spring rates 185 Front, 115 rear.
The easiest way to lower your soft top MX5. These springs result in just about a 1" lower ride height than stock. Spring rates are about 20% stiffer than stock, not close to double like some other options so the result is a car with a great looking ride height that still has plenty of ground clearance for every day roads and a nice smooth ride similar to stock with better control of the body motion when turning and braking.
Detailed specs below:
Stock heights on our ND were 14.25 to 14.75. Lowered heights with these springs approximately 13.25 inches front, and generally a bit over 13.25+ inches rear (measured center of wheel up to fender lip). Your results will vary depending on which shock you use and the age of the shocks, as shock pressure declines over time the car will settle lower.
STOCK spring rates are 156 front all models, 80 rear for most models (Club model gets 100 rear).
Progress Spring rates 185 Front, 115 rear.
These MX5 springs feature increased spring rates for upgraded handling capabilities. These springs are designed to work with OEM shocks and bumpstops but will benefit further from using high performance shocks such as Koni Sport shocks. Progress specifies only certified high-tensile SAE spring wire materials. Their MX5 springs are cold-wound on modern CNC coiling machines, then stress relieved, pre-set, and shot-peened for maximum durability.
-All spring kits are powdercoated metallic gray.
-Drop amount varies by 0.25" depending on shocks used.