CAN integration for Hush-O-Matic exhaust, 2016-2023
CAN integration for Hush-O-Matic exhaust, 2016-2023
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Description
As if having an active exhaust wasn't cool enough, this unit lets you integrate it into the car's electronics as if Mazda put it there.
The standard Hush-O-Matic works pneumatically, opening and closing the bypass depending on engine vacuum. Sometimes, however, you may want to keep it closed all the time for stealth mode - or open it up full-time for maximum aural fun. This integration kit allows you to change the bypass behavior on the fly.
To control the bypass, simply twist the control ring for the automatic wipers. Set it to maximum (+), and your bypass will be open all the time - i.e., always loud mode. Set it to minimum (-), and it'll go into always quiet mode. The three settings in between change how soon the bypass opens. You can have it go loud at 90% throttle, at 60% throttle or 20% throttle. When you turn on the wipers due to rain, the system will ignore any changes in settings.
How does it work? The MRS Micro PLC reads the status of the wiper control stalk and the throttle pedal and uses a solenoid to open and close the butterfly. All of the components are built to OEM specifications and durability requirements, so it'll keep functioning for years. A plug-and-play harness makes wiring minimal, requiring only two wires to be joined. The digital control of the bypass also eliminates any chance of buzzing as the bypass moves between positions, which can happen with analog control.
Can be retrofitted to any Hush-O-Matic exhaust. Contains the MRS Micro PLC (relay), a plug-in connector for the PLC, control solenoid and all wiring/hose to install. This kit now plugs straight into the OBD-II port, and includes a new OBD-II port so your scan tool still works. You need to connect two wires to the included solenoid, but that's it.
Only works with 2016-2023 Miatas. We're looking into making them work for '24+ models.
Instructions
Shipping
What does it fit?
Fits: 2016, 2017, 2017 RF, 2018, 2018 RF, 2019, 2019 RF, 2020, 2020 RF, 2021, 2021 RF, 2022, 2022 RF, 2023, 2023 RF, 2024, 2025
Emissions
Emissions do not apply.
Warranty
1 year
SKU
I bought the Hush O Matic for my 2019 Mazda MX 5 several years ago with the original CAN equipment where you had to cut wires under the fuse box, I wasn’t comfortable doing that so I never installed the CAN system. While looking at Flyin Miata website, I noticed that they had a new CAN system that was basically plug-in play. I ordered it and installed it today. The instructions were easy to follow and pretty fool proof if you have even a little bit of mechanical ability.
I usually leave wide open but, on occasion I will use it late at night. It works flawlessly.
Get full control of your HushOmatic! This kit is well worth the money and time to have full control of the muffler. Install is clean really doesn’t show.
There’s a new version of this kit and it’s much easier to put in than the old FM install YouTube video shows.
The hardest part was feeding the positive lead through the firewall. I pulled the rubber grommet from the hood release cable into the cabin, fed the wire through it, then pushed the grommet back onto the firewall.
I was a little bit dreading having to work under the rats nets if the fuse box, but the new system installing into the obi port and the use box in the drivers floor well was wonderful. I found that instead of making a hole in the gasket in the firewall to pass through some wires, I passed them through the sound tube hole and removed the sound tube. Much easier.
I was hesitant to install the CANBus controller because of the video showing how to connect to the underside of the fusebox. Until the kit arrived I thought there must be a easier place to get CAN-L and CAN-H than under the fusebox. I was very much relieved that the new version is plug-n-play with the OBDII connector instead. Installation was fairly easy. Excellent parts and shipping. One caution is take your time installing the vacuum line from the muffler to the solenoid under the hood. I pinched the hose in a couple of places and the system was always in loud mode until I found the problem.