RoadsterSport II Stainless Steel Duals for 06+ MX-5 Miata! for MX5
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RoadsterSport II Stainless Steel Duals for 06+ MX-5 Miata!


PART NUMBER: 60-1218


Hear RoadsterSport II Stainless Steel Duals for 06+ MX-5 Miata! HEAR IT NOW!

Reg. Price: $861.35

Sale Price: $749.00



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

Reg. Price: $861.35

Sale Price: $749.00



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


Our original 'bad boy' duals for the 2006 and newer MX5 Miata was the best selling Miata exhaust by a good margin before the RoadsterSport Q took the sales crown. This revised version II choice remains popular as a LOUDER duals choice, great for soft top owners who like to wind out their manual transmissions to redline. We suggest those adding headers or using automatics or the PRHT (Power Retracking Hard Top) look to the RoadsterSport Q.

Messing with the successful design to improve it was approached cautiously. We learned on the dyno in testing for our header that we had ideal flow into the muffler and through the core but that the 2.25 inch connections between muffler and the tips was actually too much, and that cutting to 2 inches from muffler to tip was ideal for maintaining exhaust gas velocity and maximizing horsepower gain. The connection into this muffler remains 2.5 inches for maximum flow and horsepower.

Other improvements in this version II include reinforced hangers and more sound insulation for an even more mild sound. Built in solid 304 stainless steel and completely polished to a mirror finish, our RoadsterSport exhausts are the only choice that incorporate baffle inserts that give YOU control over the final sound level.

YES, this Miata exhaust is a simple bolt on and includes everything you need (gasket too). Already a legend, our RoadsterSport II Duals Mazda MX-5 Miata exhaust is always in stock and shipping daily.

This Miata exhaust delivers the zoom-zoom that the factory exhaust does not. This Miata exhaust has an aggressive deep purr when you step on it. The factory exhaust on the 2006-2013 MX-5 Mazda Miata is one of the few places that Mazda wasted a good amount of weight. The thick mild steel stock Miata muffler canister on the 2006-2014 MX5 Miata saves Mazda a lot of money but it alone is over 27 pounds!

Our all stainless steel Miata exhaust uses the factory spacing, factory cutouts, and factory layout but saves 5 pounds of weight and adds more of a classic sports car sound. Note that the Magneflow system is 45 pounds, which is why we worked hard to take weight off by using higher density packing and higher perforation rate cores to bring our weight below stock level.

INCLUDES our exclusive baffle cone inserts which are REMOVABLE and allow you to set the sound to sporty...or extra sporty. Also available are optional packed baffles (see separate product description) with which you can quiet it down even more for longer trips.

With the baffle out the sound on this version II is about 25% more than stock. With the baffle in the sound is closer to 20% over stock. Baffles are retained by small hex bolts inserted from well under each tip.

Installation of this Miata exhaust is SUPER EASY...just two bolts! You don't even need to jack up the car, this installation can be done in your driveway! This Miata exhaust is guaranteed for as long as you own your Miata. Fits all 2006 and newer with manual transmission MX5 Miata, automatic transmission MX5 Miata, and retractable hardtop MX5 Miata!

JUNE 2013 Update: New Rolled Tip Design! Had many requests for a new thicker rolled tip. The problem with the rolled tips that all our competitors use is that they are very heavy, which helps partially explain the ugly fact our competitors don't want to admit...which is that most our competition is HEAVIER than the stock muffler. As a famous racer once said, weight is the enemy, and making a muffler that is heavier than stock and calling it a 'performance muffler' is not our style here. It took a big investment in new equipment to come up with a rolled tip that didn't add weight to our high flow performance design...but it was worth it. These new dual 3.5" OD outlet tips complete the look of the exhaust and provide a more aggressive and sporting appearance.

Yes, still works with, and includes, our unique removeable baffles that put YOU in control over final sound levels. NOTE BREAK-IN of a few hundred miles before it settles to final sound level (during that time the interior metal is getting coated with carbon, which mellows the sound).

BRIAN'S NC MX5 Miata Exhaust APPLICATION GUIDE: We have a full range of exhaust choices for the new 3rd generation MX5 Miata. All of them give you better flow for more horespower, some of them save weight over the massive 26 pound stock unit.

Since one man's too loud is another man's too quiet, here is how each of our Miata exhaust choices ranks in terms of sound level: the Racing Beat is about 15% louder than stock and very deep sounding, the Magnaflow comes in about 15-20% more sound than stock, our RoadsterSport II Duals is actually adjustable for a range from roughly 25% to 35% more sound than stock depending on whether or not you use the included baffles or the optional packed silencer baffles, and MazdaSpeed ranks about 30% more sound than stock with a little more low end boominess. The RoadsterSport RACE single tip Miata exhaust is about 50% more sound than stock.

BRIAN'S APPLICATION NOTES: This was our best seller for the manual transmission MX5 until the SuperQ came along. We prefer the RoadsterSport SuperQ for those with the automatic transmission or anybody considering purchase of a header...or anybody who wants it deep but mild and NOT loud. The demographics on this choice are interesting, as it is most popular with our buyers UNDER 30 years. My best guess on that fact is the younger guys tend to run the car in the upper RPMS more where this exhaust has its best note. Either way, if YOU are the type that rarely ventures over 4000 rpms then I strongly suggest the Roadstersport SuperQ instead for a more mild lower end sound.

Video on how the baffles are easily removed.


Read full installation hints and notes in our forum Installation Instruction Section! --- CLICK HERE TO READ MORE. The secret is LUBE your hangers well with dishsoap so you can get flanges aligned properly, and torque the supplied hardware to NO MORE THAN 25-30 ft/lbs (using more torque will actually result in LESS seal because you will pucker the flange out at the middle).


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RoadsterSport HighFlow Stainless MX5 Miata Midpipe with HighFlow Converter

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Customer Reviews

RoadsterSport II Stainless Steel Duals for 06+ MX-5 Miata!

I extensively researched the Super Q and RS2 sounds before buying the RS2... All I have to say is that I am a happy owner of RS2! Also owning a 5.7 Hemi-Cammed and muffler delete SUV, my Miata with the RS2 is loud but not obnoxious. Even on an 11-hour drive from Edmonton to Kelowna (top up and down), it was a pleasant drive with the RS2. Some sensitive Cochleas may find RS2 loud, but I NEED more brrrrrrrr!

I am planning on getting the full GWR header and mid-pipe setup to match the RS2 next year. Cheers!

I love it! It's quite pretty, and adds a tiny bit to the overall rear of the car. But oooo that sound. I'm still breaking mine in, but the low burbles are wonderful. On a long road trip, I would imagine it could get annoying. Oh wait, they come with baffles and you can get even quieter ones if you want. Well done Goodwin. Only thing negative I can say is I ended up using the OEM gasket since the one it came with seemed to leak

Beautiful exhaust. The tips have some extra length over stock which completes the rear. Install was easy. Raising the car is not required, although it does make the install a bit more comfortable. I had exhaust leaks with the provided gasket paired with the stock mid-pipe, so I went back to stock and everything is peachy. The noise increase is modest, you'll hear it when you're on it, but you're not going to draw attention. Much deeper, nicer, proper tone that gets better with miles as noted. Highly recommend.

Welds are really nice, overall a well-built piece. Also, didn't take too much time to install it. While there are some gains in sound (without baffles), it is not very much. I think I would have been happier with the race single after driving with it for a few months.

Ordered my Roadstersport2 for a 2008 Mazda Miata MX5 PRHT automatic on Friday and received it on Wednesday. First thing I did was to removed the baffles. On Thursday AM with the help of a neighbor, I am 82 years old so the help was needed. I had sprayed the studs with solvent and the rubber hangers for the last week. No jacks needed and a little force with the hangers in about an hour the old muffler was off and the new RS was installed... before we installed the new RS the rubber hangers were removed from the car and everything was sprayed with silicone spray. It made the installation quite easy. The first start was music to my ears. All it needs now is miles. I find myself using the paddle shifting for more RPM's It was a great purchase and would highly recommend it to anyone it is just what I wanted the quality is perfect and thanks to Good Win racing.
George P. - Apache Junction, AZ - 2021

The RSll has made our 2006 MX-5 so much more fun to drive ! I was thinking about buying a new MX5. But, my garage kept 2006 is in great shape, so glad I decided to add the RSll and just keep this MX-5!
I have a soft-top 6 speed automatic which I can shift into manual mode as well. Once I installed RSll muffler It was excellent, better sounding and no noticeable drone even in automatic mode.
In manual mode I could rev the engine a little more and get a more exciting sound.
I wanted a little more throaty sound and took both baffles out ( very easy ). At first my wife said it was a little too much and after verifying with Good-Win that there was no negative impact to just putting back one of the baffles. I was prepared to put one baffle back on passenger side.
However My wife changed her mind and said after riding in it several times, she likes it the way it is!!!
The folks at Good-Win were very helpful and it is great to support American made products!

I wrestled with whether to buy this muffler or the super Q. I studied all the previous reviews and noticed there wasn't a single review complaining that any of the choices were too loud. I already had a midpipe upgrade, and was wanting more tone without necessarily wanting that much more volume.

I decided to risk this "louder" (less quiet?) unit, but to also go ahead and buy the optional baffles just in case.

The muffler is great, went on as described. Easy, flat on driveway, less than an hour to swap out. Hand tools only.

This unit is none too loud. The baffles I bought are in a basket under my desk I may need them in the future if I add a header. So I'm keeping them for that possibility.

If you're considering one of these muffler choices for either more tone or volume, I can't imagine that anyone would be satisfied with any LESS than this one. It's just not a threatening difference. I'm pretty sure I would have been unimpressed if I had spent the money for a change and gotten any less change.

I'm pleased with it as is - if I add a header, I may discover use for the baffles. I only have 600 miles on it - they say it takes 1000 miles for this unit to find its true sound. If it finds a little more volume - I still won't need the baffles.

Great little product/add.

Thanks to Good-Win!

I love this exhaust. At first I thought it sounded very similar to stock but I called the support hotline and they told me it takes some miles to -mellow out-. I was not too sure what that meant but after 100 or so miles it already sounds deeper and bassier than stock. Beautiful sounding exhaust that does not sound like a can but more like a deep rumble. I was stuck between the super-q and RoadsterSport 2 and while the super q sounded nice, I wanted a louder and deeper sound with some occasional pops which is why I went with the roadster (RoadsterSport is louder than super-q so keep that in mind). When you first put this exhaust on, it won't be sounding to it is true potential but Brian said once it builds some internal carbon on all the oils and chambers it will sound more like it was designed. Very nice sounding exhaust even if you don't have the manifold and midpipe. I would say the YouTube videos they have posted are pretty accurate to what you will get once the sound mellows out. I highly recommend this exhaust and it is still a classic to consider even with the super q being a better seller.

I'm 72. Removed and installed in 1 Hr. Fits perfect and sounds great. Use dish soap on hangers. CRC on 2 old bolts. No problems. Great product. Looks good too. Removed baffles,sounds nice. Thanks for a great piece.

This axleback is one the best upgrades I have done to my baby girl. She purrs every time I step on the gas. Being automatic, reading the reviews, and Brian's application notes- i have to say this axleback was made for my car! I have to say that i wish it was a little louder but it makes up by adding a bit of performance you can feel. The car feels a lot quicker and revs high without trouble. Honestly if you are searching for an aftermarket exhaust and are looking into something like the "Q" axleback- then why shop at all! I'm sure the "Q" works great for those with induction and bigger displacement, but for stock automatic or manual, this Roadster Sport 2, is the way to go!

Absolutely love the RSII exhaust. Initially, I was pointed to the Super Q but after listening to many videos, I I realized I needed something a little bit louder as one man's loud is another man's quiet. I have zero drone from the exhaust and it sounds absolutely perfect. I even removed the baffles for a louder sound and find that it's more to my level of acceptable. I didn't necessarily need the exhaust hanger tool to install this, but I can see why others may it might be a good idea to grab this as well. All in all, this exhaust is a lot of bang for your buck and I highly recommend it. The sound is just perfect. It's the perfect level of growl with no drone and a hint of boom.

I'm a college student so I was wanting an affordable muffler with a nice deep tone as I'm trying to avoid sounding like a ricer. For my, convertible soft top, The ROADSTERSPORT II DUALS ARE THE PERFECT SOLUTION! It isn't annoying when you just want to casually cruise down the highway, but when you want to punch it you can really hear the throaty response. From the driver seat to me it sounds its best in fourth gear around 4000-5000rpms where it just purrs beautifully. Music to my ears!

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