Testing Guide

We recommend beginning by reviewing the How It Works page to confirm how they work before trying the test procedures below.

How It Works FAQ

Testing The Controller/s

There are 3 tests to confirm the controller functionality:

  1. Eco Mode Test

    Set the car to Eco / Comfort mode to close the exhaust valves.

    Once the valves are visually confirmed to be closed, try the remote ON button.

    Will only work once you see the valves are closed.

    See the test
  2. Click Test

    Put your ear to the controller. When pressing the ON and OFF buttons, you will hear a click sound for each button press.

    You may need to keep the car's ignition on only, without the motor running, if you cannot hear the clicking.

    See the test
  3. Sound Test

    Drive the car at a constant steady speed and gear (such as a highway) in its quietest mode.

    Then press the controller ON and OFF buttons to hear the difference in exhaust note as the valves open and close.

    See the test

See more details for each test below.

Test 1

Eco Mode Test

Eco Mode Test

1. Power on your car

  • Wait for it to fully warm up and for the idle RPM to drop to its normal level.

2. Set the drive mode to Eco / Comfort / turn off exhaust switch button.

  • The goal is to set the car to the quietest mode where it closes the valves.

3. Visually confirm the valves are closed.

  • Using a torch, look inside the exhaust to see the valves are closed.
  • If they are not visually confirmed to be closed, the test cannot be verified.
  • Do not proceed to step 4 until you know the valves are closed.

4. Use the controller remote:

  • Press the ON button: the valves should open.
  • Press the OFF button: the valves will return back to normal / car control (closed).
Test 2

Click Test

Click Test

1. Power on your car, just ignition only

2. Place ear next to controller

3. Press ON and OFF buttons on remote

  • You will hear a quiet click from the controller for each button press.

4. No click sound?

  • Repeat steps again with the car fully powered on.
Test 3

Sound Test

If you cannot see your valves from inside the exhaust.

1. Power on your car

  • Wait for it to fully warm up.

2. Set the car to its quietest mode (Eco / Comfort)

3. Drive the car

  • At a constant steady speed and gear (such as a highway).
  • Making sure the car has its valves closed.

4. Switch ON and OFF buttons

  • Listen for the sound difference in exhaust note as the valves open and close.
  • For Mercedes-Benz models, wait 5 seconds after pressing the button.
Mercedes-Benz

For Some Mercedes-Benz Models

For Some Mercedes-Benz Models

For certain Mercedes-Benz models *as noted on the product page*, the controller works slightly differently:

  1. The controller takes 5 seconds for the valves to open after pressing the controller ON button.
  2. The valves require a new signal from the car to close after turning the controller off. Either from changing the drive modes or throttle input. If you blip the accelerator, the car will send a new signal to the actuators and the valves will close and return back to normal. But while driving the signals are sent so frequently that as soon as you press the OFF button, the car will regain control of the valves right away.

More info and video example

Not working?

After reviewing this guide, performing these 3 tests and reviewing the knowledge base, please check the Troubleshooting Guide.

Troubleshooting Guide