About the springs:
New and improved! No, really. We revisited these springs and applied what we've learned about the NC chassis Miata over the past 20 years. We adjusted the ride height and tweaked the rear spring rate for an improved stance and better ride and handling. The new spring rates are based on what's offered on our acclaimed Fox suspension, giving a "flat ride" with no porpoising on dips and less chance of bottoming out the rear. The rear ride height has been lifted slightly to prevent a droopy look.
Based on our measurements, the extra weight of the power hardtop is not significant enough to require a change in rear spring rate so we offer a single option for both the soft top and PRHT cars.
FM springs are well known for providing a good balance of street ability and track performance. Their combination of ride height - giving the suspension room to work - and spring rate means your Miata will ride and handle better than you would expect from a set of performance springs.
There's more going on than you think, though. See that section with the tighter coils? Those are designed to act as a secondary spring, keeping the spring from going loose under full droop. While these rates might sound high compared to some other springs on the market, they are stiff enough to keep your car off the bump stops. Softer springs will often give a worse ride because they allow you to blow through your suspension travel and end up on the stops. We've specified a powder coat with a high zinc content for extra corrosion resistance, too.
How much will they lower your car? We can't tell you, because Mazda changed the ride height of Miatas over the years. However, if you measure from the center of the wheel to the fender lip, you can compare your car to the final result. It's not a huge drop but once you drive the car you'll appreciate how well it works.
Includes a complete set of our upgraded bump stops.
Specifications for the NC
Front springs: 300 lb/in
Rear springs: 240 lb/in
Front ride height: 13.5"
Rear ride height: 13.5"
About the shocks:
The Koni Sport shocks have adjustable rebound so you can crank them up when you're feeling frisky on the autocross course. They come with a lifetime warranty for the original purchaser (US/Canada only).
About the sway bars:
Sway bars are used to make your car corner flatter and react faster by keeping the body (and all the weight) under control. Ours are set up for neutral handling and are adjustable so you can tailor the handling of your Miata to your own driving style. Our sway bars are hot formed from 4140 CrMo spring steel. This means they're stronger than the cold-formed bars found elsewhere. We've designed them to keep the same handling balance as your stock sways, but they have two settings in the front for fine-tuning. Includes brackets and urethane bushings with waterproof grease. Our NC sway bars use hollow 1" tube in the front, and with our new rear spring rate, we retain the stock rear sway bar.
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