Many years in the making and Good-Win Racing is now the only vendor making Helmholtlz exhaust solutions for ALL years of Miata!
Most exhausts are stuffed cans with resulting frequency balance far from ideal as the more musical notes are indiscriminately absorbed and a tiring monotone DRONE....is the final note. Exotic cars increasingly tailor the exhaust note with Helmholtz chambers that knock down specific frequencies to craft a pleasing note you want to hear while killing the drone frequencies you don't want in the result.
How is it done? Each generation of Miata is tested with a computer and sound spectrum analyzer and microphones and driven under varying conditions and loads with mufflers and without any muffler to measure the frequencies produced. We then use that data and special software to calculate the particulars of the Helmholtz chambers needed to precisely knock down the frequencies we do not want to hear while allowing the good throaty burble fun sounds to pass through. The result is all the fun, an exotic burble throaty result, without the drone that wears out the driver on longer drives. Result has a great dual personality because the effect of the Helmholtz is very frequency specific, under decel it is mild and quiet when ordinary stuffed mufflers can drone, yet when you push hard toward redline the helmholtz system rewards with exotic sounding fun. FUN when you want it, yet mild when just cruising.
CLICK the links to go listen to the videos for your application!
NA Helmholtz RoadsterSport 4
NB Helmholtz RoadsterSport Muffler
NC Helmholtz Midpipe. Picture is version 1, now shipping version 2 with updated bracket but still same function.
ND
RoadsterSport Race
RoadsterSport SuperStreet
RoadsterSport Super Q
RoadsterSport SuperQ TwinTip
SuperQ Header Version, which adds additional resonator you can just barely see in this pic after the inlet flange because removing header from this car is essentially removing a very effective resonator from the system (the cat itself)
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