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RoadsterSport RACE for MX5-ND
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RoadsterSport RACE

2016-2022

Just 12 pounds!

A Revolutionary Helmholtz Chamber Race Muffler for Max Fun!

ETA FOR NEXT BATCH IS FEBRUARY

PART NUMBER: 61-1733

READ REVIEWS (55) | WRITE A REVIEW

SALE
Reg. Price: $481.85

Sale Price: $419.00

Quantity:

FREE SHIPPING

Free shipping offers apply only to destinations within US Lower 48.

SALE
Reg. Price: $481.85

Sale Price: $419.00

Quantity:

FREE SHIPPING

Free shipping offers apply only to destinations within US Lower 48.

DESCRIPTION

Most FUN Miata race muffler right here, yet not for everyone!

Call it Dual Personality, Call it Jekyll and Hyde, this is the Rebel in our exhaust lineup and the sound level result depends on what you are doing with the gas pedal and the gear selection. Slam the gas to the floor and run for redline and you get a wonderfully throaty throbbing exotic racing rumble with lots of burble that sounds BETTER than an MX5 Cup Car. BUT when you close throttle you do NOT get the drone and cabin resonance of those pure race cars, instead it gets relatively mild on decel and when just cruising in top gear on the freeway. What we have here is the first Miata Race muffler sane folks can really live with every day without pissing off the wife or the neighbors (unless they WANT to).

Continuing with the dual personality, with the top DOWN it makes lots of fun sound as you work the gears, yet with the top up and cruising just a mild purr on mild acceleration and very little drone when you close the throttle or engine brake or run light throttle up hill.

The secret to getting all this fun without the pain of drone on decel is the exclusive Helmholtz chamber included in this design. In fact, this design is ALL Helmholtz and no traditional sound absorbing materials unless you get the optional race baffle.

Tarnish Alert! One downside of making this minimum weight is no fake double walled tip to keep the outside metal looking pretty, you must expect with this single walled choice that it will tarnish with heat because that's what happens to single walled stainless steel. If that will bother you, get any of our other choices that has a double walled tip and weighs more as a result.

How did we do it? We outfitted our 2016 with a computer and sound spectrum analyzer and microphones and drove it under varying conditions and loads with and without muffler. We then use that data and some special software to calculate the particulars of the Helmholtz chamber to precisely knock down the frequencies we do not want to hear in the car while allowing the good throaty burble fun sounds to pass through. In brief, FUN when you want it, and mild when just cruising. The Helmholtz chamber knocks down over 40db of sound in the 120-130 hertz range. That does NOT mean no bass sound, it does mean massive reduction of drone you otherwise get with a straight pipe design

All this in a 12 pound design, a big drop from the 20.5 pound factory muffler. Includes a straight through high flow design from the midpipe out the polished pipe tip for max power.

SHIPPING NOTE...ships factory direct to you. All POLISHED 304 stainless steel construction and LIFETIME warranty. Uses stock hangers and connects to either our midpipe or the stock midpipe.

NO BAFFLE INCLUDED but takes our optional Race Baffle that slides in and lowers sound level for the extra long drives or between racing weekends (baffle sold separate on this website).

Proudly made in the USA, emissions legal in CA and every other State of the Union.

BRIAN'S APPLICATION NOTES: Mild when cruising on otherwise stock ND, delivering a classic sports car BARK and THROATY RUMBLE when you wind it out to redline, lots of fun burble when just playing with the throttle around town. Easily UNDER our local SCCA sound limits on otherwise stock Miata (our SCCA limit here is 93 db at 50 feet and even in the rain our testing found it easily under our strictly enforced sound limits). Also easily under the most strict 92db days at Mazda Raceway Laguna Seca when used on otherwise stock ND. Result is TONS of fun, will make many of you laugh out loud. You also get the best performance from the straightest and cleanest flow out the exhaust cutout you can get, and much lower weight. Nonetheless, this choice is NOT for the faint of heart!!! The most common question we will get on this one is: "will it be too loud" and we cannot answer that one for you because the "right" sound level is a matter of entirely subjective personal preference. We can say our experience with thousands of customers has taught us that Automatic transmission owners prefer our SuperQ choices. And if our RoadsterSport SuperQ is 10 to 15% more sound than stock (depending on use of removable baffle), this RACE is a full 50 to 55% more sound than stock when on throttle, though perhaps just 20% over stock when cruising home in high gear and low rpms. Not designed for use on car with header or midpipe change, designed for max fun on otherwise stock exhaust system. Adding header adds a massive amount of sound, thus we suggest customers considering adding a header should look to our SuperQ choices. The issue with using adjustable length midpipe with this three hanger design is that customers rarely get the length correct and that can put too much stress on the connection between helmholtz chamber and straight pipe, so if you insist on adding midpipe with this design be careful to get length of midpipe accurate (hangers aligned nicely straight up and down for midpipe) and use thicker hanger from the rear to better support the bigger midpipe.

Slant cut to dress it up just a bit!

Ride Along with our RoadsterSport Race in a Launch Edition owned by local customer Mark Booth below, big thanks to Mark for the great video!

Note the RACE does not include any baffle but we offer an OPTIONAL

Packed Baffle that gives you the ability to quiet it down significantly. Adding our RoadsterSport Midpipe doesn't change the character of the sound but adds ANOTHER 20% more sound over and above what you get with the RoadsterSport Race. Below is a sample of that sound combo of our RoadsterSport Midpipe and this RoadsterSport Race muffler courtesy of our own Ryan Passey:

BRIAN'S INSTALL NOTES:

Installation of this Miata exhaust is SUPER EASY using the stock hardware already on the car...just two stock 14mm bolts to loosen! When you open the big box you will find separate foam wrap on the exhaust tip, leave that foam around the tip during your install to protect the polished tips and your car's soft plastic in the exhaust cutout. Use gloves. Note the 'bolts' from the factory are actually studs with springs and nuts and the factory usually jams the nuts on so hard that unbolting it will bring the stud out too. If that does not happen then use a 13mm long socket to unscrew the studs, or use jam nut technique where both nuts are put on one stud against each other and then wrench used on the inner of the two to back out the stud. Then lube up the stock exhaust hangers with dish soap and yank stock muffler back and forth to work the soap into the rubber hangers and then the muffler will slide off those rubber hangers easily. Then hang the new muffler on the wet and soapy rubber hangers and torque 'bolts' with the springs back in place to 30ft/lbs. Now you can remove foam tip wrap. Note the muffler to midpipe joint is a ball socket connection for the first time on a Miata, it is designed to move a lot on that very special stock high density ball socket gasket, so please do not add sealants that will gum up that dry ball socket joint. Our pipe size is bigger than OEM for best flow, that means the stock donut gasket sinks a bit deeper than with factory muffler. Our flange is designed as a dual purpose item that allows going to flat gasket if you later go 2.5 inch midpipe, at which point the midpipe has a flex joint to replace function of the donut. After install hold you hands about 2 inches from gasket connection with car running to check if you feel 'puff puff puff' indication of leak against your hands, if you do check your install or replace the factory gasket (our item 61-2144, factory part number RFK2-40-581 )

Local Fast Buddy Jeff Cawthorne laying down fast time in his new ND. Our RoadsterSport Race muffler adding some sound!

And leaving the line at SCCA autocross event:

Another Great Customer Video

Finally, TWO customers with this Race muffler, one following the other on the sort of fun canyon drive that Miata dreams are made of!

Dyno Results! From Grassroots MotorSports Magazine's testing, 8 hp from just a muffler on ND1...when the muffler is a straight pipe design like RoadsterSport Race and SuperStreet Single Tip and SuperStreet Twin Tip.

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TEAM RECOMMENDATIONS

Customer Reviews

RoadsterSport RACE

Installed my RoadsterSport Race over the weekend and I can't say enough how much I absolutely love it!!! It reminds me of the sound of my old "71 ALFA spider, but cleaner and more tuned. It sounds like the ALFA was sent to a recording studio with a professional sound engineer instead of a home recording, in the basement, with an old tape deck.

Good-win Racing, you have without a doubt done justice to ND Miata.

Bought the Roadster Sport Race for my RF, very happy with it. I would like it to have a little burble on decelerations and down shifts but other than that it sounds great. No drone at all, just loud enough, not too loud for any environment, neighborhood or around town.

I purchased this muffler right when I saw the "PREPAY" option a month after the last batch got sent out, it took about a month for it to get here, but only 3 days when they got them back in stock. You'll need a 14mm and a 13mm socket wrench and some dish soap for the hangers, that's it. Very easy to install, took me longer to find the right attachments for the wrench than anything, as it needs to be longer to fit around the end of the threads and reach the actual nut. The sound is very clean, not loud enough to be obnoxious, but it will definitely grab attention. If you wanna just make noise you'd probably opt to add their midpipe as well. Acceleration feels smoother and the ride is much more enjoyable, all around an amazing product, however, one thing I noticed is that when I was finishing tightening up the nuts on the springs, it just stopped tightening, that aspect was very weird to me, as I didn't know whether to keep tightening or to let it be, the connection didn't have any room to knock or move around, so I figured it was fine. Honestly, I feel like the connection to the factory midpipe isn't the best, despite being very close to the stock muffler, but the hangers will hold it in place so it's nothing to worry about. Great customer service btw, if you have a question, send them an email! They respond very quickly, the same day every time I sent an email.

Love, love, love, love it!! The Race is as described. Mild when driven easy, throaty and exotic when pushed hard. Exotic is the definitive word!! Smiles per mile have easily doubled!! I was also impressed with how well it was packaged from the factory. Nice job!! Well worth the pandemic wait!!

This product surpasses the blurbs about quality, fitment and performance. The sound is excellent (if just a shade loud on acceleration!) and as mentioned, the cruising drone is gone (I did install some Noico sound deadening material just to make sure. Trunk bottom functions as a soundboard!) As usual, service and shipment have been excellent! Good products, good service, good prices! Very pleased.

Great little exhaust! Super easy install. I think less than 30 minutes all in.
Adds just the sound this car deserves. I don't think it's too loud at all and it's especially civilized at lower rpms allowing you to drive in and out of the community without annoying the neighborhood.
Love it!

Super Light when compared to the stock muffler, installation was a breeze. Sounds nice and rich with a good amount of burble. cold start is very satisfying. I have this paired with the magnaflow midpipe and it is a good duo. sound delivery very clean especially with top down. my biggest fear was that id get the typical civic trash can sound with this muffler, but it turned out very nicely.

Absolutely fantastic. I had purchased the Cobalt unit but the deep highway drone was terrible. I purchased this at my wife's suggestion! It seems to be a bit louder but is actually a higher, sportier pitch. There is no drone at highway speeds! Cruising in town and on the highway produces almost no exhaust note. Punch it and a clear, focused and "sporty" sound results. Everyone is happy!

Sounds awesome and fitment is perfect! Not nearly as loud as I thought it would be which is great, and the tone without drone is amazing!

Excellent work!

Less is so much more. Super light weight and sounds like a proper sports car now. They really nailed the sound tuning on this unit, it has a nice deep rumble. Not too loud for cruising or when you're going easy on the throttle. Price is very competitive with other exhausts (actually far less expensive than many) and my Miata club friends now have muffler envy. Shipment was received within days and packed perfectly. Great job Good-Win Racing.

Got it within 3 days after order placed, great costumer service. installed it today and took it for a drive, it sounds brilliant, on of best sounding for the ND, don't know what to say more. Soo happy with this purchase.

I just installed this exhaust today, so these are only initial impressions. In short, I love it! The exhaust note sounds very refined, with a rich tonal quality; it doesn't have any of the metallic rattly sounds that I associate with modded Civics or WRXs. With modest throttle inputs it's reasonably quiet, and when cruising at highway speeds I actually thought it was quieter than the stock exhaust. At the very least the tone is more pleasing and less droney when cruising. When you give it the beans, though, it really comes alive! Above 4k RPM it howls like an exotic car, and every downshift made me grin like an idiot. I even got a few little pops and burbles when coming off the throttle every now and then. I don't know if it gave me any kind of power bump, but the sound is so good that I don't really care. For the price I can't imagine a better exhaust.

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