This is a modified version of our all helmholtz Super Street muffler that adds small chamber dual tip muffler to add lots more user control, four different sound settings with the included MIXING BAFFLE, over TEN different sound level and tone variations if you mix in the optional packed baffles available on this site. Nonetheless, this is a VERY aggressive muffler by design with roots in our RACE muffler, with the included mixing baffle fully inserted left (Driver's) side to bypass the final chamber this muffler becomes precisely the same layout and sound as the RACE muffler. Progressively back out the included Mixing Baffle to lower the frequency balance of the result and overall DB level. This choice is designed and intended for max FUN on otherwise stock ND, the volume will overwhelm if you add a catless header.
UPDATE May 2017, we now include a Mixing baffle that effectively converts this muffler to same sound as the Race muffler when fully inserted driver's side tip, adding back in the higher frequencies the chamber would otherwise convert lower (to cover the costs of adding that blocking baffle we are ending the RoadsterSport script on the tips and deleting the less effective pair of cone baffles). Result is more effective control over tone and the balance of treble vs bass than any other choice, max upper frequency fun is mixing baffle fully inserted driver's side tip, back it out to the other positions to progressively shift frequency balance lower.
Separately on the site is a fiber packed long baffle that effectively converts this unit to same frequency balance as the SuperStreet Single Tip. Thus, now essentially THREE mufflers in one here, the Race with included Mixing baffle, the SuperStreet Single tip if you add packed long baffle (item 60-1325SSTT), or skip the long baffles and use standard length baffles in one or both tips (item 60-1324T) to keep the bass heavy frequency balance but lower the volume. Result is a 17 pound street muffler with MORE flexibility than all other choices.
You get the great look of the RoadsterSport rolled and polished twin tips, the clean flow of the shortest possible path from the midpipe to the exhaust tips to max your horsepower gains, unprecedented level of user adjustment...and minimal weight with these features.
Driver's side tip pathway is essentially a straight through and adding Mixing Baffle to driver's side tip progressively cuts off the chamber and massively lowers the bass notes and raises the upper frequency response, etc.
Proudly made in the USA, emissions legal in CA and every other State of the Union.