RoadsterSport STREET SINGLE MX5 Miata Muffler, Just 12 pounds! 2006-2015

RoadsterSport STREET SINGLE MX5 Miata Muffler, Just 12 pounds! 2006-2015

Regular price$499.00
Shipping calculated at checkout.

  • Free Shipping available within the US!
  •  Licensed Authorized Dealer
This MX5 Miata Muffler was designed for both RACING... and STREET.


This muffler features a 6" diameter canister and comes in at an ultra light 12 lbs, making it a perfect fit for SCCA's new Club Spec race series.

Why a single exit muffler? Let's face facts, dual exhausts on a straight four cylinder Miata is a ridiculous waste of weight for the serious sports car enthusiast (Mazda talks about gram strategy in the development of this MX5 but they wasted a lot of weight on duals that provide no performance benefit over singles YET lots of extra weight).

Just 12 pounds means this MX5 miata muffler is 15 pounds less than the stock MX5 miata muffler! How do we do it? For this design we started with our 7 pound Race and added more diameter filled with sound suppression materials and we separated the sound suppression chamber into THREE internally baffled chambers for sound wave attenuation in what is still a highflow design. By using a higher than normal perforation rate on the super high density core, WITH three internally baffled sections, we get absolutely minimal weight and sound for a 12 pound single.

Our original RoadsterSport "RACE" Miata Muffler with smaller 4" canister is an amazing 7 pounds and designed for the autocross and track MX5 Miata drivers who need to meet sound limits in the low 90 DB range with absolute minimal weight. That muffler has also been a big seller with our younger MX5 owners seeking to make a statement and have some fun with their street use. However, many asked us to make another single more focused for the street users... a fun single Miata Muffler that is more subtle than our 7 pound Race wonder... but almost as light. That turned into a tough challenge and after many prototypes you see the production version here.

This 12 pound Miata exhaust compares with 19 pounds for our RoadsterSport II Duals and over 26 pounds for the factory exhaust. Designed to accept our glass packed baffle insert to quiet it down more if you like, which is sold separately. SHIPPING NOTE...ships factory direct to you. Final is All POLISHED stainless steel construction and LIFETIME warranty. Uses stock hangers and connects to either our midpipe or the stock midpipe. Includes mounting gasket and hardware.

BRIAN'S APPLICATION NOTES: Rather mild when cruising on otherwise stock NC, delivering a classic sports car bark when you stick your foot in it...tons of fun, better performance, and much lower weight. Nonetheless, even this big STREET single is not for the faint of heart. The most common question we 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. However, if our RoadsterSport Q is 10 to 15% more sound than stock (depending on use of removable baffles), and our RoadsterSport II is 15 to 25% more sound than stock, this STREET SINGLE is 30 to 45% more sound than stock on otherwise stock NC (substantially less than our RACE Single which is a full 50 to 55% more sound than stock).

This STREET SINGLE is also a great RACE TRACK and Autocross choice for those running beyond stock class with performance headers or superchargers and needing more sound suppression in a single than our 7 pound Race (but daily driven STREET drivers with headers and superchargers will likely want the RoadsterSport Q instead!). Popular with manual transmission soft top owners, not recommended for those with automatics or PRHT. Yes, this takes the same OPTIONAL Packed Baffle

Sound Files at our Exhaust Blog


OCTOBER 2012 Update: New Tip Design! Had many requests for a new thicker rolled tip for our Street Single. Yes, still works with our unique removeable baffles.

COMPARISON of STOCK MUFFLER with STREET SINGLE on otherwise stock cars.


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).

Recently viewed