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There is only one muffler available at this price.
Here is our original RoadsterSport Super Q product description:
Our Best Miata Exhaust! We are so confident this is the best MX5 Miata exhaust that we let you drive it for 90 days and if at the end of 90 days you don't love it, you can send it back in original package for exchange to any of our other choices!
Our Best Seller!
Promised for years and we finally got it done, a revised version of the famous RoadsterSport Q that is even more successful at controlling sound for customers making modifications such as highflow headers and superchargers. It is NOT quieter than standard Q under acceleration, it is NOT quieter than standard Q when cruising, but it is more controlled where you want it more controlled, which is under deceleration at low rpms where most high flow dual mufflers will drone on this motor. It was mostly customers with superchargers requesting an upgraded version of the Q, but we also got some requests for this special version of the Q from some customers running our RoadsterSport Max Power header and some running our PPE Long Tube header.
Again, sounds the same under acceleration as Standard RoadsterSportQ...but even more successful at controlling boom/drone on decel. Dimensions are the same as regular Q, and just six ounces heavier than standard Q.
This attenuation design is a premium "NO-DRONE" choice, great for those with manual transmission and especially for those with the AUTOMATIC transmission (which tends to keep the RPMS in the lower ranges). By using smooth mandrel bent 2.5 inch tubing to redirect the flow for a side entrance to the muffler we engineered a sound wave attenuation first chamber to knock down volume level dramatically while maintaining a flow-through design. This attenuation chamber design muffler is the most mild and mellow on an otherwise stock MX5 Miata...about 10 to 15% louder than stock...with a deep sporty burble anytime you hit the go pedal but quiet when you are just cruising.
This premium MX5 muffler is also the BEST choice for those who plan such additional mods as a supercharger or header change (a header change unleashes a massive amount of additional sound). Our latest and best dyno results for an otherwise stock Miata....and for modified Miatas with the header change all the way to supercharged were obtained with the RoadsterSport Q muffler. ALL THE FLOW, without the noise!
Yes, simple BOLT ON that bolts to our midpipe, or the factory midpipe, or our Racing Beat midpipes. INCLUDES New Gasket and fresh Nuts and Bolts to make your install super easy. Weight is 24.5 pounds with baffles removed, 26.5 pounds with baffles installed (stock muffler is over 27 pounds).
Finished in tips which INCLUDE our exclusive baffle cone inserts which are REMOVEABLE and allow you to set the sound to sporty...or quiet. Also available are optional packed baffles (see separate product description) with which you can quiet it down even more for those using a header or supercharger, or race midpipe, etc. This system is 10% to 15% louder than the stock Miata muffler on an otherwise stock MX5 Miata exhaust system....and only 25% over stock sound level when used with our complete 2.5 inch RoadsterSport header and 2.5 inch RoadsterSport midpipe. Baffles are retained by small hex bolts inserted from well under each tip.
Proudly made in the USA with a LIFETIME WARRANTY. Fits all 2006 and newer Miatas with manual or automatic transmission, soft top or retractable hardtop.
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! Installation notes on our forums --- CLICK HERE TO READ MORE. This Miata exhaust is guaranteed for as long as you own your Miata.
BRIAN'S APPLICATION NOTES: Everything we have learned about MX5 Miata exhausts, all our best tricks, have gone into this RoadsterSport Super Q. It is the perfect FIRST MODIFICATION and still the best choice for anyone planning future upgrades such as a header change or supercharger. It is quiet when you cruise down the freeway but delivers a sporty deep burble when you push your foot harder on the gas. This Miata Exhaust is the choice on my own soft top MX5 for driving around town...and my wife's PRHT MX5, and my strong recommendation for anybody wanting an exhaust with a super smooth burble, or any owner planning additional exhaust changes (header change or supercharger). This is also our top recommendation for owners of the automatic transmission and Power Retracting Hardtop.
Even more impressive than the peak horsepower gains is the broad torque gain from low to middle rpms, as shown in the dyno report from our forum 2012 project PRHT which you can read more about in our forum
MAY 2012 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 best 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.
Read full installation hints and notes in our forum Installation Instruction Section! 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).