RoadsterSport "Q" Stainless Steel Muffler for 06-15 MX-5

RoadsterSport "Q"
Stainless Steel Muffler
2006-2015 MX-5 

This is a very popular Miata Exhaust! Good-win Racing is so confident this is the best MX-5 Miata exhaust that they 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 their other choices!

Promised for years and they 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 high-flow headers and superchargers. This is also a great recommendation for customers with automatic transmissions, and or customers with the PRHT hardtop, or any customer wanting something deep and throaty when they put their foot in it but not shouting at them when they are just in cruise mode.

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 Good-win Racing 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 MX-5 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 MX-5 muffler is also an excellent choice for those who plan such additional mods as a supercharger or header change (a header change unleashes a massive amount of additional sound). Good-win Racing's 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!

Simple BOLT ON installation that connects to the RoadsterSport midpipe, the factory midpipe or the Racing Beat midpipes. INCLUDES New gasket and hardware 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 an exclusive baffle cone inserts which are REMOVEABLE and allow you to set the sound to sporty...or quiet. Also available are optional packed baffles 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 MX-5 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, emissions legal in all 50 states! 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!  This Miata exhaust is guaranteed for as long as you own your Miata.

Pictures above of new ROLLED TIP APPEARANCE PACKAGE VERSION on TRUE RED MX5 with APPEARANCE PACKAGE (notice dividing line between upper red section of bumper and lower RED section of added appearance package). Nice flush fit for cars with appearance package!

BELOW is another version of the factory appearance package, 2013 Club with Roadstersport Q Appearance Package version in the left picture and before shots showing factory muffler in the right picture. On this version of rear bumper pick the regular Q muffler if you want the tips to stay nearer to stock location OR pick appearance package Q for result you see at left.

GOOD-WIN RACING'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 MX-5 for driving around town...and my wife's PRHT MX-5, 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 Good-win Racing's 2012 project PRHT.

Rolled Tip Design! Good-win Racing had many requests for a thicker rolled tip. These 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, their unique removeable baffles that put YOU in control over final sound levels. 

White 2013 (below and right) shows how standard length version fits another version of factory lower rear valance (if you want the tips longer that what you see here, then look at our version for Appearance Package).

INSTALL NOTES:
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).