PART NUMBER: 61-1784
Our BEST MX5 Sways! These Front and Rear PROGRESS MX5 Miata sway bars were developed on our own 2016 Project MX5 with all our racers here driving the car at the limit at local SCCA events to perfect the balance and test the bars at the limit. A perfect match for our Progress Springs to make your MX5 corner flat and stable through the most challenging turns!
Grassroots MotorSports Magazine picked these same sways for their Project ND, and concluded: "Our MX5 exhibited much less body roll. It felt better from behind the wheel. It looked better too, as our sports car wasn't trying to corner on the door handles. It certainly felt better, but what did the stopwatch say? The new anti-roll bars shaved our average lap time by 1.34 seconds." December 2016 Issue.
Progress MX5 anti-roll bars dramatically improve handling. How? They minimize the traction-robbing body "lean" that rolls part of the outside tires off the pavement. Our Sport-tuned Anti-roll MX5 Miata Sway bars replace skinny OEM Miata Sway bars and rubber bushings with larger diameter (stiffer) alloy steel bars and polyurethane bushings.
More roll stiffness means less body "lean", and the tires stay flatter on the pavement (larger contact patches). The result is more grip and added driver control!
-Less body roll means more traction, faster cornering speeds, and increased driver confidence.
-Polyurethane bushings produce crisp response on turn-in. Progress Anti-roll bars are cold-formed in-house using custom-built precision bending equipment. Laser-cut and CNC bar ends are MIG welded in place using a precise fixture for an exact fit that is more durable than alternatives used by some other choices.
-Size: FRONT 28.5 mm (hollow bar; 6.35mm side-wall)
-Size: REAR 16 mm SOLID
-Adjustment Range: Front 3 holes, Rear 2 holes
-All sway bars are powdercoated metallic gray.
-One year limited warranty
BRIAN'S APPLICATION NOTES. Our Endlinks recommended to properly reach all the front bar holes. With these bars the ND Miata is so much more flat and stable...and a blast to drive on freeway on-ramps and mountain roads! These bars are finished off MUCH nicer than most choices, in some ways that will not be obvious from the little photos. Perhaps the most obvious difference between these bars and any other brand is the triangle shaped extra brackets you see in the pictures. If you look at the factory rear sway mounts the purpose will be immediately clear, because you will see that not all four of the factory rear mount corners are actually connected/supported. It brings back memories of what Mazda did with the NA/NB front sway mounts, where failure of the factory mount became so common that we had to offer a complete replacement mount (and Racing Beat offered 'blocks and bolts' for that generation to reinforce the factory mount to avoid it breaking). Very similar here, because the factory rear ND sway mount is not actually connected all four corners we provide the brackets that fully box the mount. We found solid .75 bar at the rear performed SOFTER than .62 bar with fully boxing the mounts. First picture below is the factory mount not supported on one side, and then second picture showing our bracket in place that fills the gap to fully box the mounts for long term strength and reliability.
SETTNGS: I strongly caution and suggest a more forgiving starting position such as middle or tightest position front (tightest is closest to center of bar) and the less tight rear setting (hole nearest bar ends) until you have some experience with the setup under controlled circumstances (such as an autocross event or big parking lot).
Autocross Tested by the Entire Good-Win Racing Team!
Track Tested by the entire Good-Win Racing Team at Mazda Raceway Laguna Seca!
Video below shows our ND in first two sweepers of Autocross event at full throttle and you can see it is much more flat in the turns than stock thanks to Progress Sways and Progress Springs.
Ride along in our ND Miata for First Place finish with our Progress Sways and Ohlins coilovers.
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Incredible results after front and rear bars. This upgrade converted Mazdas fun car into a true sports car. Flat through virtually any corner. Precise without feeling twitchy. Cant wait for the next track day.
Installation notes: Front install clearances are extremely tight. Skip the coffee and load up on patience. It can be done DIY on jack-stands. Good-Win tech support is fantastic if you have questions.
If you are upgrading your suspension then finish the process with these anti-sway bars. I did some research and these were the perfect marriage with the GWR springs upgrade. I had them professionally installed to ensure it was done right. (Not as simple as some would have you believe for every DIY guy) I went with GWR's recommended middle hole config up front as this setup is for spirited B road driving only. The rigidity these provide is immediately noticeable in the ride quality and steering response making the car feel dramatically more responsive overall. I would highly recommend this mod if your goal is to compliment any other suspension mods. A+
Peter - FL 11/2019
These bars make the car feel so much better! Mazda should have made these sway bars standard on all NDs.
Having done 4 suspension overhauls on a BMW E30 and E36, and both Miata NB and NC generations, here are my quick notes on this particular installation. I am no expert, just a DYI mechanic with a bit of experience.
- Front sway bar took about 2.5 hours. Definitely a bit more difficult than an NB or NC.
- Rear sway is fairly simple.
- Highly suggest not lowering the front subframe, but instead lowering the steering rack.
- Steering rack lowering: There are two big bolts holding it to the front subframe and you have to disconnect the u-joint (one little bolt) to the steering wheel. And mark mark mark the alignment, otherwise you'll end up with an off-center steering wheel.
- If you end up with an off-center steering wheel, don't fear. Just go back and disconnect the u-joint bolt, change the alignment by one or two gear teeth and try it again.
- I would highly recommend leaving the underbody panels off the car until you have confirmed steering wheel alignment and have torqued down all the bolts (after putting it on the ground).
- Watch this video on how to remove the sway bar from the car, it takes a lot of patience:
- Body roll gone! Once again a well-engineered Progress sway bar makes a Miata feel the way it should have from the factory.
- Improved steering response, for me at least. Can't guarantee this will happen for everyone. Before even getting an alignment, the steering feels more responsive. Most likely because of the reduced body roll.
- It feels great in all conditions. So far I have not found any situations where I would prefer the stock setup.
Great addition to my setup. Big difference, the body roll that once was so prominent on curves is virtually gone and the car now feels very planted-stable on the roadway.
If you don't love your ND's body roll, then buy these right now. Absolutely amazing the difference in handling they make with zero impact to ride quality. Honestly, if you want to drive your MX5 like it was meant to be driven, I can't think of a single reason not to put these on.
As for installation, I was able to install them in my garage with just a jack and jack stands. The front was definitely a pain and tested my patience, but it was doable. Just make sure you pay really close attention when reinstalling the steering rack. I did all the necessary prep work and thought I checked several times, but I still ended up being off by a spline which has left me with a slightly off center wheel (until I have a chance to get back under the car that is).
The rear installation is super simple if you have the right tools. I did not have an impact gun and getting the subframe bolts off was pretty impossible. But after I brought home an electric impact from Home Depot the installation was the easiest thing in the world.
One note on the rear installation regarding the added bracket. When tightening the subframe bolt it can grab the bracket and start twisting it slightly causing the diagonal metal bar to bend. I mention it because it is easy to counter if you are expecting it.
I trusted Brian again to produce a part that was more than worth the cost. Mazda should have made these sway bars standard on all NDs. During straight line driving the car now feels planted and in the turns it stays flat. All the gittery feeling is gone from the suspension. If you can only do one upgrade to your ND, I recommend you put these on it. Rear install takes about 10 minutes. Fron install takes about 30 minutes but you really need a hoist. I did rear and had the shop I use do front.