COMPLETE PREMIUM HELMHOLTZ CHAMBER Cat-Back RoadsterSport 4 Miata Polished Stainless Steel Exhaust for 90-97

FOURTH GENERATION UPDATE: A revolution in exhaust technology finally available for all 1990 through 1997 Miatas, our new HELMHOLTZ exhaust system features a standard resonator in the connecting pipe to slightly lower volume and rasp and an exclusive all Helmholz main chamber at the back that reduces the standing wave inside the exhaust system! Cuts the boom frequencies of 120-130hz by over 40+db inside a top up Miata cabin which is a common source of complaints with the most aggressive aftermarket exhausts on the Miata. Result is all the FUN throaty sounds you want, without the drone levels other systems make that wear you out on long uphill and downhill sections of road.

Proper Sports Car sound with a deep mellow tone at cruise and a vintage bark when you put your foot into it. Smooth perforated core and smooth bends for max power.

Muffler section is 16.5 pounds...and included connecting pipe is 8 pounds (less weight than most choices).

This Miata exhaust is the ONLY 90-97 Miata exhaust with adjustable sound via additional packed baffle on our site. Includes fresh stainless nuts, bolts and gasket to complete your install. Includes our unique removable baffle cone tip so YOU are in control of the sound level and can adjust for extra sporty or calm it down a bit for longer trips.

ALL STAINLESS STEEL and lifetime warranty! INCLUDES COMPLETE MIDPIPE section so that it this is a COMPLETE BOLT ON solution from your converter flange back. Built in solid 304 stainless steel and completely polished to a mirror finish, this premium Miata exhaust is our only choice that incorporates a big Helmholtz chamber to help control drone and a baffle insert that gives YOU 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). And, you always have the additional option of our packed baffle to calm it down even more, which are sold here separately on this website....for a total of THREE different sound levels from the same exhaust. With an ear pleasing exhaust note, great price and easy installation this Miata exhaust is a great beginning for Miata performance modifications.

BRIANS APPLICATION NOTES. We did helmholtz chamber exhausts for NC and ND generation Miata and got lots of requests to bring this technology to the NA application. Every other choice on the market is essentially just fiberglass with perforated tube in one shape or another and fiberglass kills the fun sounds while doing a poor job of killing the BAH-AH-AH-AH DRONE you otherwise can get in small 4 cylinder cars. Rear can in this setup has no fiberglass and instead uses tuned valve Helmholtz chamber that acts like a little air piston and massively lowers standing BOOMINESS you otherwise get with a straight through flow choice like this setup. Result is all the fun when you plant your foot hard but reasonable when you just want to cruise and hear the stereo, etc. Includes the connecting midpipe which is a separate cost item with some of our other choices (Racing Beat). The slightly larger tubing of the RoadsterSport Miata muffler means a slightly deeper tone and a little more burble on decel than the factory exhaust, 2.25 inch tube size all the way and finished with 3 inch tip, SMOOTH bends, straight through SMOOTH perforated core design for maximum horsepower.

This is an AGGRESSIVE exhaust at full throttle, a fact we are enthusiastic about, and not apologetic about! The helmholtz chamber keeps it reasonable at light throttle, and allows almost a straight pipe full flow design with great control over drone so we can let all the fun sound out at full throttle. The result is very split personality, reasonable when you want, seriously full voiced fun when you want. The Helmholtz chamber knocks down what most of us perceive as drone by over 40 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 choices, 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.

Not recommended with Magnaflow catalytic converters, reason is they shift sound from peak drone targeted by Helmholtz chamber tuned to stock converter and similar high density core replacements.

This Miata muffler carries a LIFETIME WARRANTY, built from all polished stainless steel and is made with pride in the USA.