PART NUMBER: 61-3318
Want the easy button for maximum street FUN with comfort? Look no further than our RoadsterSport Suspension Package for the 2006-2015 Mazda MX-5.
What's included with the package:
1 x Progress Spring Set for either NC1 or NC2 according to your selection in the drop-down menu.
2 x Koni Sport FRONT Shock
2 x Koni Sport REAR Shock
1 x Sport Bumpstop Kit (36mm Front / 58mm Rear)
Good-Win Racing Application Notes:
Our new favorite for around town fun that looks great with mild lowering and rides great with super mild lowering springs. The Progress springs have the perfect amount of spring rate to make the car more composed in the turns without causing a harsh ride day to day. These are also a great choice for those who want to replace the soggy factory springs without dropping the car too low.
Want more? The included Koni Sport Shocks are rebound adjustable which let you take the ride from soft to stiff with the turn of a dial. If you are headed to the mountain and canyon roads then crank up the dial, and lean on them in the turns and you will find the car is MUCH more predictable and faster through the curves. When you are ready to head home, simply adjust the shocks down and drive home in comfort.
Ride heights with this combo are about 1" lower than stock, but note there is some variation between cars and that comparison also depends on the age of your current shocks/springs.
INSTALL NOTES: It is important to not lock down the bolts to the suspension after install while the car is suspended in the air with the suspension fully extended. Bounce it on the ground, then give it a drive around the block with the bolts just snug so you get it to settle before you torque everything ON THE GROUND. Most shops will NOT know to do this...SMART CUSTOMERS PRINT ALL THIS PAGE FOR THE INSTALLER! See details in our forum installation section, thread is titled: "Spring Installation, Mazda Workshop Manual Notes" and factory TSB notes below. Once you do it right, drive it 500 miles and then do it again (which usually results in another quarter inch or more of lowering)....and then do the alignment. ROCKY'S TIPS: Our head mechanic Rocky has his own method that seems to work even better than the factory TSB. Once he finishes install at each corner he jacks up just that corner with BOTH UPPER AND LOWER LINKs loose, so the full weight of the car is compressing just that corner, then he torques the bolts...and he finds car will still settle with 500 miles but usually only another 1/8th inch.
Alignment depends much on what you do with the car. Assuming no autocross or track use, for pure street driving my suggestion is:
Front Camber -1.8
Toe IN 1/32nd per side (some shops call this 1/16th 'total' toe in).
Rear Camber -1.2
Toe IN 1/32nd per side
Racers will take much more camber (and usually full coilovers instead of just these very mild street springs). Autocross customers will toe OUT the front, track users usually toe ZERO front and rear.
Install below on Customer Paul Young's MX5 Club, heights immediately after install using the Rocky method explained above, 13.5 front, 14.0 rear.
And soft top version of Club, same Progress springs, same results of 13.5 front, 14.0 rear.
These are an evolution of same springs that Mazda sold in the factory optional MSR package for 2007 MX5 that DOMINATED the Stock/Street SCCA Autocross class for years. Take a ride in a fast MSR and notice how fast and stable an MX5 can be with these springs as part of the package that includes our FCM stops and KONI Sport shocks and Progress Sway.
Customer Chip Barclay's Miata below with our Progress Springs, KONI SPORT Shocks, and our 17x8 Advanti Racing Storm S1 Wheels.
Ordered in April, just got time to install the package this week. I was replacing the OEM shocks and springs on our 2007. Just as Good-Win describes, this is a great improvement in ride and handling over the original setup. Car doesn't roll as much in the turns, feels very stable ("planted"). The ride is just a hint stiffer, but not harsh at all - feels like a proper sports car! The install took me about 10 hours, I'm a decent mechanic but I don't have a shop, and much of that was fetching tools that I didn't have, and working off the garage floor / jacks for the entire job. Not complicated, if you follow Brian's instructions and check the forum for other install hints and videos (included in that 10 hours..). The setup dropped the car 1" in the front and 3/4" in the back, although I'll follow Brian's directions and loosen and retighten the bushings in a couple hundred miles and maybe get a little more. Gives the car the stance it deserves. Very satisfied!
The ideal suspension for most people. Combined with progress bars the car still has just the slightest amount of playful roll before it grips and GOES. Maintains the feel of the original car but in a far less dramatic fashion (the roll on stock suspension and 245 Falkens was comical). Add in the fact that the ride is actually BETTER than stock and I'm a happy camper. This is sort of an "STR Lite" build/DD. Excited to try it out at the next Autocross. I am glad I didn't go with the stiffer coil overs. This is a very well sorted package. If you are trying to win nationals, you probably need coilovers (and an ND2). For me this will be good enough for some local top 10s and a few class wins and is a JOY to drive on back roads.