RoadsterSport SUPER-Q TWIN TIP Stainless Steel MX5 Exhaust ND Models - GR-042 61-1958

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  • $1,799.00
  • Regular price $1,849.00
  • incl. GST

Helmholtz Chamber Design Means All the FUN, without the DRONE

Twin Tip version of our famous Super Q.

Suits ND1 and ND2

Following the huge popularity of our NC MX5 application "Q" Muffler this Q for ND MX5 is once again "Q" for 'Quiet' version. This attenuation design is a premium "NO-DRONE" choice, great for those who want a more throaty sound than stock but still mild. Smooth mandrel bent tubing redirects the flow for a side entrance to the muffler where we engineered a three chamber design. It would be much cheaper to just use a single big muffler with nothing but perforated pipe through the centre surrounded by sound absorbing materials, but doing it right with the three chamber design allows us to tailor precisely the FUN sound you want when you push it toward redline, without the harsh drone on decel that the more simple designs make you suffer.

This triple attenuation chamber design muffler is the most mild twin tip MX5 exhaust of our choices and mellow on an otherwise stock MX5 ...about 20% louder than stock when on the gas...with a deep sporty burble anytime you hit the go pedal but nearly as quiet as stock when you just want to cruise.

This triple chamber design features an exclusive 'Helmholtz Resonator' first chamber that massively reduces the standing wave inside the exhaust system, reducing the 'booming' tendency by over 50db inside a top up MX5 cabin that is common on many aftermarket MX5 exhausts. To create this Helmholtz chamber we outfitted our 2016 ND Gen MX5 with a computer and sound analyzer and microphones and drove it under varying conditions and loads and without the stock muffler for the computer to carefully measure the sound spectrum coming out the stock midpipe. We then use that data and some special software to calculate the particulars of the Helmholtz chamber size and valve specs to precisely knock down the frequencies we do not want to hear in the new MX5 while allowing the good throaty burble fun sounds to pass through. The result is deep throaty burble, without the drone!

The Helmholtz chamber gives this muffler a dual personality, under decel it is super mild and quiet, yet when you push hard toward redline it gets more racy! With the top down lots of throaty burble, but dramatically more tame when the top is up. Just 11kgs. In brief, throaty burble when you want it, and yet totally mild when just cruising top up.

Yes, simple BOLT ON install, just two bolts!