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