RoadsterSport 4 Helmholtz Polished Stainless Steel Miata Exhaust Muffler 1999-2005 THE ONLY NO DRONE HELMHOLTZ CHAMBER NB MIATA MUFFLER.

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 about 40% more sound than stock, baffle out is 50% more sound than stock... so you always have a choice for those longer trips). Weight is lighter than factory, 18.25 pounds.

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.

INSTALLATION:
Install is awfully simple. Disconnect the two nuts/bolts connecting muffler to midpipe. Use dish soap on old stock muffler rubber hangers to get them to slide off. Ideally have exhaust hanger removal wrench handy to make getting the rubber hangers off even easier (even Home Depot now sells them for about 20 bucks). Reverse those steps to install the new muffler. Tighten nuts to 30 ft/lbs

BRIAN'S APPLICATION NOTES: This is an AGGRESSIVE exhaust at full throttle! The helmholtz addition does not make it quiet, quite the opposite, it allows almost a straight pipe full flow design with good control over drone when just cruising so we can let all the fun sounds out at full throttle. The Helmholtz chamber knocks down what most of us perceive as drone by over 35 db but it lets all the rest of the upper frequency fun and pops and burbles right on through! That means by definition this muffler is aggressive, has a ton of attitude on an otherwise stock Miata, and is NOT for everyone! Given that this muffler is aggressive on otherwise stock Miata, it will be really loud, race track loud, if you add header and highflow cat. 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 mildest bigger mufflers such as our Racing Beat, and in our experience this includes all owners of the optional automatic transmission, and any other owners who drive around at low rpms most of the time. If you hit the redline at least three times on the way to work in your Miata, this might be your exhaust. If you never hit the redline because you are afraid you will 'hurt' the car, please look at our Racing Beat exhausts

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