Good-Win Racing Mazda Performance Parts

RoadsterSport 4 Helmholtz Polished Stainless Steel Miata Exhaust Muffler

1999-2005

Miata 1990-2005 · Exhaust · Mufflers


Part Number: 11-1004H

Application: 1999-2005

Reg. Price: $459.00

Sale Price: $399.00

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RoadsterSport 4 Helmholtz Polished Stainless Steel Miata Exhaust Muffler
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FOURTH GENERATION UPDATE....The Helmholtz chamber revolution in exhaust technology finally available for all Miatas! Our new HELMHOLTZ exhaust system features an exclusive Helmholtz main chamber that massively reduces the standing wave 'boominess' or drone inside the exhaust system! Cuts the 'booming' frequencies of 120-130hz by over 35+db inside a top up Miata cabin which is a common source of complaints with aftermarket exhausts on the Miata. Result is all the FUN throaty sounds you want, without the drone other systems make that wears you out on long uphill and downhill sections of road.

Updated version of our favorite NB Muffler, now the ONLY choice on the market with Helmholtz chamber...AND adjustable sound level! YES, fits manual and automatic transmission. Built in solid 304 stainless steel and completely polished to a mirror finish, this high quality Miata exhaust is our only choice that incorporates a baffle insert that gives YOU some control over the final sound level (baffle in is only about 15% more sound than stock, baffle out is about 25% more sound than stock...so you always have a choice for those longer trips). Weight is lighter than factory.

For those that want even more sound add our highflow Miata midpipe for more flow and another 10% more sound.

This latest version of our best selling Miata exhaust has both baffle included and a double walled tip for years of lasting good looks while giving you control over the final sound level. And, you always have the option of our packed baffles which are sold here separately.

BRIAN'S APPLICATION NOTES: This is a LOUD exhaust. The helmholtz addition does not make it quiet, quite the opposite. The Helmholtz chamber knocks down what most of us perceive as drone by over 35 db but it lets all the fun other sounds right on through! That means by definition this muffler is aggressive, has a ton of attitude, and is NOT for everyone! Designed for the three pedal owners out there who love to zing these amazing sportscars to redline daily. Know who you are, if you are actually driving the car around at very low rpms our experience is that you will prefer the bigger mufflers such as our Racing Beat, in our experience this includes almost all owners of the optional automatic transmission.

LIFETIME WARRANTY, this Miata muffler is made with pride in the USA. YES, includes gasket and hardware needed for install.

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REVIEWS

I red'all the parts in the order I placed and installed them in my car yesterday. I am beyond happy. The install went without a hitch. The results were fantastic. The new brakes track straight, make no noise, and stop the car authoritatively. The new rotors look pretty cool, which we all know isn't all that important, but having 6 women offer to bear your children, because your car looks SO cool is a good problem to have. Thank for great products and service.

-- Chaz C.

Hi There Good-Win Racing. I just wanted to thank you guys so much for the great customer service and quality parts. My 91 MX-5 is running awesome thanks to the parts I put on it from your website, racing beat sway bars, racing beat endlinks, racing beat muffler, magnaflow catalytic con, shifter parts, and a few more. Thank you so much for making your website so knowledgeable and easy to get all these awesome MX-5 parts. My MX-5 handles, drives, and sounds awesome with all the new parts, Thanks a Million!! I look forward to ordering a new exedy performance clutch and light weight flywheel from Good-Win Racing in a couple months.

-- Sean

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