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Hush-O-Matic exhaust for ND

The business end of the active exhaust.
Hush-O-Matic exhaust for ND
Loud when you want it, quiet when you don't.

Made in the USA

Exclusive to Flyin' Miata

Availability: In stock

Only 2 left



The problem with exhaust systems is that they're either loud or quiet. And sometimes you want one and not the other. Meet the first active exhaust for the Miata! They're popping up on high end cars all over the place.

At idle and light throttle, the exhaust stream is routed through an effective muffler that keeps the sound levels low. Very comfortable and neighbourhood-friendly.

But when you dip deeper into the throttle pedal, a butterfly opens to allow the exhaust to bypass the muffler completely. This cuts down on restriction and you can hear the car respond to your extra enthusiasm. When you want it loud, it's loud. Never obnoxiously so, but sporty.

We also have a CAN integration package that allows you to change the behavior of the exhaust on the fly by simply twisting a dial. You can change from always loud to always quiet or set the percentage of throttle needed to open the bypass.

The butterfly mechanism is an OE-quality part with a very long lifespan. As with all of our exhausts, this system carries a lifetime warranty for the original owner on the mechanical parts.

We cannot give a specific decibel rating for this exhaust, as that depends on the measuring technique as well as other modifications on the car. If you are competing in a noise-sensitive facility and are having trouble with noise levels, it's possible to change the muffler over to the "always quiet" mode quickly and easily. That will drop sound levels to just a bit over the stock muffler.

*Due to the design and operation of the butterfly valve used in the Hush-O-Matic muffler, the valve may experience a slight vibrational noise at the point of closure. This typically happens when applying a light throttle, however in most cases the there is little to no noticeable effects. The CAN control system eliminates the chance of this noise.

Additional Information

Additional Information

Part number 06-49190
TÜV approval available No
Fits: 2016 MX-5 soft top, 2017 MX-5 soft top, 2017 MX-5 RF, 2018 MX-5 soft top, 2018 MX-5 RF, 2019 MX-5 soft top, 2019 MX-5 RF
Manufacturer Flyin' Miata
Flyin' Miata exclusive Yes
Fits Exocet? No
Proposition 65 Warning: Cancer and reproductive harm
California emissions Emissions regulations do not apply

Customer Reviews 6 item(s)

Great sound, beautiful construction, happy driver.
I installed my HoM this morning and have been driving all day. I absolutely love it.

The install was straight-forward and easily completed by a novice mechanic with no help. Some co-ordination required to remove and install the exhaust without an extra set of hands, but the whole thing took me less than an hour.

The trickiest part of the install is definitely removing and replacing the vacuum line on the barb that comes out of the back of the engine. It is in a tight spot, so small hands definitely help. I don't have small hands, so I found removing the brace helps, as does swearing under your breath.

This exhaust makes the car sound as good as it looks. A touch deeper at idle and when noodling through my subdivision, but it wakes right up when I go past about 20% throttle. Bassier, no drone, louder without being offensive, and a nice burble when I let off the gas. Super happy with this -- I took a chance, buying without hearing it on a similar car, and I'm glad I did.
Review by Jean-Paul / (Posted on 7/12/2018)
It's like having two mufflers from "that other guy".
Two mufflers in one...or actually three now that I have a version of the future CAN-BUS integration through the variable intermittent windshield wiper switch installed (occurred at the 2017 Summer Camp event).

My muffler now runs from quiet, through three modes of active, to full-loud based on the five wiper settings. Awesome.

Fit, finish, and quality is all up to the usual FM standard. A must-do for those that like having a Jekyll & Hyde attitude.
Review by Richard Dekker / (Posted on 9/11/2017)
You get what you pay for
Sounds great, excellent instructions, top quality. I installed the muffler and control myself in a day. Not a quick task but very straight-forward. The results are pretty much perfect. I have a long-tube header setup (but also tried muffler with a standard-length header) and I'm convinced this is one of the few options out there that can offer performance and sound quality on a header setup (I tried other mufflers). In both cases, the sound is tamed and is pretty much perfect. It's reasonably quiet when you want it to be and has a nice, progressive, deep sound as you get into it. I recommend using this with a LT header, or standard length header with the stock mid-pipe. Add an aftermarket mid-pipe and it will be too loud for most people. I couldn't be happier and wished I had started with this one!
Review by AllanPaige / (Posted on 4/30/2017)
Perfect Exhaust Note
Perfect exhaust note! It's exactly the sound I was looking for. Mellow and deep without any rasp or harshness. This muffler is the way to wake the ND up without offending the neighbors.

The install was easy enough even though I wound up not able to reuse the stock studs. The nuts were on so tight that even with a vice they wouldn't come off -- the stud and the vice just kept tearing up. New studs were easy to find at ace and it allowed me to get the parts tightened appropriately much easier. (Friendly suggestion to FM to include new studs and nuts just to make this whole thing easier)

There's very little instruction on running the vac hose, but it was super easy.

This is my second FM part (I also got the sways), and I couldn't be happier.
Review by ATL-ND / (Posted on 9/16/2016)
4 Thumbs Up
The exhaust is fantastic. I was concerned it would not be louder at all but it was exactly what I'd hoped for. Under idle or no load it is slightly louder making it easy to carry on a conversation with or without the top down. Under load it sounds awesome. Not tin can awesome but enhanced factory sound awesome. The tips also look great. Installation was simple and easy. I wish I could say the same, however, for the remote control. There was one more clip that needed undone for the fuseblock than detailed in the instructions which caused me to damage the hidden extra one. It appeared I received a pre-production version from what I could tell as the wire connectors supplied were not the same gauge wire as the wires being spliced in. The photo of the parts were also not exactly the same leading me to believe this was done before the final product was completed. Looking at the wiring inside the fuseblock that needed cut and spliced and the mis-matching instructions, I was not confident in quessing this version was correct and was not going to risk damaging the electrical on a brand new car. Exhaust yes! Remote no.

Note from Flyin' Miata: thanks to this feedback, we will be revisiting the instructions.
Review by Miata4ever / (Posted on 6/5/2016)
Installation of muffler and electronic control went well. The mechanical side was easy. If you are not comfortable with small wiring in a tight place (bottom of underhood fuse box), have a trusted competent person assist you. The results are great!
I purchased the muffler and the electronic control. The muffler installed easily and fits perfectly. The electronic control was a bit tricky to connect the wiring under the fuse box. However, being careful and not rushing was the key to my successful installation.
The result is outstanding! The Flyin' Miata video can't duplicate how nice the car sounds. In the quiet mode the sound is just slightly louder than stock. Just the right volume for a true sports car with a quiet idle and NO drumming sound at freeway speeds. In the active mode, the sound has a deep, throaty note that sounds so nice, especially on a twisty uphill with lots of gear changes. This is Miata number 8 for me. All generations, from street to track day prepared and this is the best sound I have experienced!
Review by Vancouver Ken / (Posted on 4/28/2016)
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