RoadsterSport 4 Helmholtz Polished Stainless Steel Miata Exhaust Muffler 1999-2005

RoadsterSport 4 Helmholtz Polished Stainless Steel Miata Exhaust Muffler 1999-2005

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.