Everything You Need To Know About Exhaust Controllers

Everything You Need To Know About Exhaust Controllers

Overview

1. Introduction to Exhaust Valves and Controllers

Want to know what exhaust valves are? Need to find a way to fully open your exhaust valves and get the most out of your car? Want to hear the full unrestricted sound of your exhaust? Many car enthusiasts wonder the exact same things, so we’ve got you covered.

In this article, you’ll learn how exhaust valve systems work, why having control of the valves is such a game-changer, and the best options for adding that control, from stock settings to aftermarket mods. If you’re looking for safe, reliable solutions to maximize your exhaust sound, this guide has you covered.

Valved Exhaust System

Anywhere from an Audi RS3 to a Lamborghini Urus to a BMW M5 to a Volkswagen Golf R to a McLaren 765LT and in between, if it has an active exhaust system, you can find a way to open the valves and regain full control.

2. How Exhaust Valve Systems Work

Many modern cars come equipped with valved exhaust systems. These valves allow the car to control the flow of exhaust gases, using electronically or vacuum controlled valves to regulate sound levels, emissions, and engine efficiency. These valves open and close at specific engine speeds or load conditions, allowing for quieter operation at lower engine loads and more aggressive exhaust sounds at higher engine loads.

The exhaust valve is a butterfly valve that acts as a gate to a more free flowing section of the exhaust. When the exhaust valve is closed, the exhaust gasses are forced to flow through the muffler which lowers the exhaust sound. With the valve open, the exhaust gasses are free to flow through the less muffled exhaust section, resulting in a louder sound and increased performance.

exhaust valve open and closed

Factory Control Mode Settings

Changing your car’s mode to race, track or dynamic, opens the exhaust valves, allowing you to hear more of your exhaust sound. However, these modes never fully open the valves and does not leave them open. They usually remain only partially open at idle, and often only fully open within a certain RPM range.

driving mode button

Take the Porsche Sports Exhaust (PSE) example. Even with the PSE button pressed, the valves don't start opening gradually until about 4000 RPM under heavy acceleration, then continues slowly opening as RPMs increase, and it's not until around 5000 RPM that the valves fully open.

So if you want to keep your exhaust valves fully open, continue on to find out how.

3. Exhaust Valve Types

To find the right method for opening your exhaust valves, you need to first determine what type of actuator your exhaust uses. The two most common types of exhaust valve actuators are vacuum and electric.

Vacuum Actuators

Most earlier models of cars before the mid 2010s, commonly use vacuum actuators. These actuators use engine vacuum pressure to only open or close the exhaust valve, with no in-between.

vacuum exhaust valve actuator

Electric Actuators

These were replaced with the more common and current electric motors, which are controlled by signals sent by the Engine Control Unit (ECU) for the exhaust valves to be opened, closed or anywhere in between. This allows more precise control based on various factors like speed, load, or driver input.

various electric exhaust valve actuators

What type of exhaust valve do I have?

You can inspect your exhaust valve and check if the actuator looks more similar to either of these two pictures above. Other telltale signs are the wires or vacuum tubes coming from the actuator.

4. Why You Might Want To Control Your Exhaust Valves Manually

Many car enthusiasts would agree that one of the most important sensations of driving is hearing the sound of their car. It is a visceral experience that adds an emotional connection to driving, enhancing the thrill and excitement. So if there was a way to turn up the sound even more, it would further improve the driving pleasure.

Here are some reasons why you might want to get control of those exhaust valves.:

  • Customize Your Driving Experience: With manual control, you can choose the exhaust volume to suit your mood or the environment. Want a quiet drive on a morning commute? Keep the valves closed. In the mood for a more aggressive sound? Open them up on command.
  • Hear your car like never before: Unlock the full potential of your exhaust and hear notes you never experienced before as the exhaust valves are now opened when previously they were closed.
  • Optimize Sound for Every Scenario: Car meet-ups, racing events, or road trips – each setting might call for a different sound. You can set your exhaust however you prefer it.

 

Is it safe and legal?

  • Safety: When making any modifications to your car, it is always recommended to seek advice from a professional and leave installation to a qualified expert.
  • Legality: Any modifications to exhaust systems and active valves may only be acceptable for off-road use, racing use or show purposes. Before choosing to modify your car, please inform yourself about the legal regulations in your location as it may not comply with your local laws.
  • Warranty: Please inform yourself about the warranty for your car as it may affect sections of the manufacturer's warranty.

 

Section Summary

Here is an summary of some of the questions that were answered in this section:

1. What is a car exhaust controller?
An exhaust controller is a way to regain full control of your active exhaust system and open the valves whenever you want, then close them when you need.
2. How can I control my car's exhaust sound?
You can control your car’s exhaust sound by opening the valves to make it louder or closing them to make it quieter, using an exhaust controller.
3. Can I make my car exhaust louder with a controller?
Yes, using an exhaust controller can make your car louder, as the exhaust valves can be left open for times when they previously were closed, resulting in a louder exhaust note.
4. Are exhaust controllers legal in my state?
Before choosing to modify your car, please inform yourself about the legal regulations in your location as it may not comply with your local laws and may also impact the sound emissions test.
5. Is a car exhaust controller worth the money?
For many car enthusiasts the most important sensation of driving is hearing the sound of their car, so making the car louder is often an obvious choice. But having the ability to make it louder or quieter is the best of both worlds, and is definitely worth it.

Ultimately, having control over your exhaust valves isn’t just about sound - it’s about creating a tailored driving experience that gives you a unique connection to your car. Now, let’s take a look at the different methods you can use to get this control.

5. How Do I Open My Exhaust Valves?

There are several options for opening your exhaust valves, and to help you pick the best method to suit your needs. Here’s a breakdown, from using the factory settings to aftermarket solutions.

 

1. Unplugging Connectors

One trick to opening exhaust valves is to unplug the connector to the actuator while the valve is open. This will keep the valve open, but doesn’t allow for manual, on-demand adjustments. Doing this also throws a Check Engine Light (CEL) or hidden error code, and can even cause the car to go into limp mode as the ECU detects something is wrong.

 

2, Blanking Plugs

To avoid these CELs and errors, blanking plugs can be used to bypass the valves entirely. Installed in place of the connectors, blanking plugs keep the exhaust fully open at all times. While this solution provides an easy solution to opening the valves, it removes the option to close the valves and quiet the exhaust. These are suited primarily for electric type actuators.

exhaust valve blanking plugs

 

3. ECU Tuning

For a highly customizable approach for both vacuum and electric actuators, ECU (Engine Control Unit) tuning might be the best choice. By reprogramming the car’s ECU, you can adjust various settings, including the exhaust valve behavior, to suit your exact preferences. This option offers the most control over how and when your exhaust valves open and close. However, ECU tuning is complex, can be costly, and may void your car’s warranty, so it’s usually best suited for experienced users or those comfortable with in-depth vehicle modifications.

 

4. Exhaust Controllers

A popular solution is a remote control exhaust controller, which enables you to open and close the valves manually. Depending on the model, some products allow you to fully open the valves at the press of a button, while others provide full open-and-close control choice. This independent control lets you switch between a quiet and aggressive exhaust tone as desired, regardless of the driving mode. Now you can fully open your exhaust valves whenever you want. Exhaust controllers are typically plug and play, and are compatible with almost all electric and vacuum actuated exhaust systems.

typical exhaust controller

Each of these methods has unique advantages and considerations. In the next section, we’ll explore the pros and cons of aftermarket solutions in more detail to help you determine the right choice for your car.

 

Section Summary

In this section we addressed some of these commonly asked questions, here is a rundown:

1. What are the best exhaust controllers for performance?
For the ultimate control, a custom ECU tune can allow the valves to be controlled based on a lot of different parameters. Or for an easier option, an exhaust controller can let you open and close your exhaust at the press of a button.
2. What is the best exhaust controller for a high performance car?
The best would be any that allows you to open the exhaust easily and is made specifically to suit your make and model.
3. Can I control the exhaust sound from inside the car?
Depending on which control option you chose, you can use a remote control or button to open or close your exhaust from inside your car.

6. Pros and Cons of Each Solution

Choosing a solution to control the exhaust valves on your car can significantly enhance your driving experience, but it’s important to weigh the benefits against potential drawbacks of each option. Here’s a breakdown of the pros and cons of each option.

 

1. Unplugging Connectors

Pros:

  • Free.
  • Easy to do - just unplug them.
  • Reversible - can reinstall connectors easily and return the exhaust to original.

Cons:

  • Causes CEL / errors and may put the car into limp mode.
  • Exhaust valves are always open and cannot close them on command.

 

2. Blanking Plugs

Pros:

  • Easy to install and uninstall.
  • Unlocks your exhaust’s full potential with the valves always fully open
  • Prevents CEL and error codes.

Cons:

  • Exhaust valves are always opened and cannot be closed on command.
  • Your neighbors might begin to dislike your loud car.

 

3. ECU Tuning

Pros:

  • Allows advanced control over the exhaust valves. Fully customize when and how your exhaust valves operate, even linking it to other car parameters.
  • May be able to be programmed to a factory button for an Original Equipment Manufacturer (OEM) feel.

Cons:

  • Costly; depending on make and model, and desired exhaust valve functionality.
  • Complex; reprogramming the ECU requires professional expertise and specialized equipment.
  • Making modifications to the factory ECU software may void your warranty and increase the likelihood of experiencing issues if not properly tuned, so it’s essential to use a reputable tuning specialist.

 

4. Exhaust Controllers

All Other Exhaust Controllers

Pros:

  • Full control of your exhaust valves. Fully open them whenever you want or return them to factory control and quieten your car at the press of a button.
  • Depending on the product model, may allow to force valves closed or even somewhere in between.
  • Some products also recall the last selection on startup. So if you last selected to close the valves, next time you start your car, they will remain closed.
  • Not expensive for aftermarket performance parts; some exhaust controllers aren’t much more than some blanking plugs.
  • Not difficult to install.

Cons:

  • More difficult to install than blanking plugs, as you have to cable manage wires and secure the module, but easier than a custom ECU tune.
  • Prices vary; some exhaust controllers can cost significantly more than blanking plugs. The added functionality of some models adds to the higher costs.
  • Depending on the product model, forcing valves closed may potentially cause problems as the manufacturer of the car has developed the car expecting a certain exhaust flow restriction. For example, heavy engine loads with a closed and more restrictive exhaust may cause issues.

 

11MODE Exhaust Controllers

Pros:

  • Fully open your exhaust valves anytime you like at the press of a button in any drive mode. Quieten your exhaust and return the control back over to the car by closing the valves when needed.
  • Easier to install than most other exhaust controllers. No tools required. No need to worry about cable management or securing any modules.
  • More affordable than other exhaust controllers and closer to blanking plug pricing.

Cons:

  • Does not allow you to force close the valves, due to the concerns of potentially damaging the car.
  • Starts up in default car control and does not recall the last selection.
11MODE exhaust controller vs typical other exhaust controllers

 

Comparing The Options

The strengths and weaknesses of each option are summarized in the comparison table below.

Option

Cost

Installation

Function

Reversibility

Unplugging Connectors

★★★★★

Free

★★★★

Unplug and cover connectors

★

Valves always open but causes CEL / errors

★★★★

Remove connector covers and cable ties and plug back in.

Blanking Plugs

★★★★

Cheaper than most exhaust controllers

★★★★

Like unplugging connectors

★

Valves always open, no CEL / errors

★★★★

Just remove plugs and cable ties and plug in connectors.

ECU Tuning

★

Tuning can be costly especially custom tunes

★

Requires specialized software and by trained professionals

★★★★★

Can fine tune function based on many variables automatically

★

Requires tuning to remove or overwritten by factory software

All Other Exhaust Controllers

★★

Prices vary depending on make / model

★★★

Easy to install but some cable management required

★★★★

Depending on model, can open and force close, and remember on car start up

★★★

Remove device, wiring and cable management

11MODE Exhaust Controllers

★★★

Cheaper than other exhaust controllers

★★★★★

No cable management required

★★★

Open valves or return to car control. No forcing closed

★★★★★

Just remove controllers

 

Section Summary

In this section we addressed some of these commonly asked questions, here is a rundown:

1. What are the best exhaust controllers for performance?
For the ultimate control, a custom ECU tune can allow the valves to be controlled based on a lot of different parameters. Or for an easier option, an exhaust controller can let you open and close your exhaust at the press of a button.
2. What is the best exhaust controller for a high performance car?
The best would be any that allows you to open the exhaust easily and is made specifically to suit your make and model.
3. Can I control the exhaust sound from inside the car?
Depending on which control option you chose, you can use a remote control or button to open or close your exhaust from inside your car.
4. How much does an exhaust controller cost?
Depending on what exhaust controller option you go with and what brand, prices can vary. Typically blanking lugs are the cheapest option, but do not give you full control. Exhaust controllers give you full control but vary in price depending on model and function. Exhaust controllers by 11MODE are typically the most affordable options for exhaust controllers.

By considering these pros and cons, you can find the option that best fits your budget, level of exhaust valve control desired. In the next section, we’ll walk you through a step-by-step guide for installing these four options.

7. How Do I Install It?

While installation is generally straightforward for all of these options, it’s always recommended to have this work done by a professional if you’re not familiar with automotive tools or working beneath a vehicle.

Safety Note
Working beneath a car and handling automotive tools require proper safety precautions. Always follow the manufacturer's instructions when using any tools. For example, if using a jack, always secure the vehicle with jack stands on a stable flat surface. If you’re uncertain about any part of the process, it’s best to consult a professional installer to ensure the job is done properly and safely..

 

1. Unplugging Connectors

As the title suggests, simply unplug the connectors. Please note that this method can cause problems with your car as it causes CELs and errors and may put the car into limp mode, so please proceed at your own risk.

Step 1: Prepare your car

  • With your car on and running, change to the driving mode that leaves the valves open
  • Inspect the valves to confirm that they are open, you may need a flashlight to see inside the exhaust.
  • You may need to lift your car using a jack or on ramps to better access the exhaust valves.

Step 2: Unplug connectors

  • Remove the connectors from the exhaust valve actuators.
  • Repeat for the other side if your exhaust has two valves.

Step 3: Tidy up

  • You may want to seal the ends of the connectors and actuators with electrical tape to protect the electronics.
  • Cable tie the unplugged connector somewhere on the car in a place that will prevent rubbing on anything sharp and away from touching anything hot.

Step 4: Inspect

  • Check for CELs or error codes using an OBDII reader. If you have any issues, re-install the connectors to return the car back to original.

The exact process depends on what make and model car you have so please check forums for more detailed instructions.

 

2. Blanking Plugs

You can install blanking plugs using the same method as described above for unplugging connectors, with one minor change.

Step 1: Prepare your car

  • With your car on and running, change to the driving mode that leaves the valves open
  • Inspect the valves to confirm that they are open, you may need a flashlight to see inside the exhaust.
  • You may need to lift your car using a jack or on ramps to better access the exhaust valves.

Step 2: Unplug connectors

  • Remove the connectors from the exhaust valve actuators.
  • Repeat for the other side if your exhaust has two valves.

Step 3: Tidy up

  • Instead of covering the connectors, instead plug in the blanking plugs to the end of the connectors, and into the actuator if included with your particular kit.
  • Again, cable tie the connector somewhere on the car in a place that will prevent rubbing on anything sharp and away from touching anything hot.

Step 4: Inspect

  • Check for CELs or error codes using an OBDII reader. If you have any issues, re-install the connectors to return the car back to original.

 

3. ECU Tuning

This is a much more involved process and too in depth to be covered here, so it is best to be left to professionals. This process essentially involves modifying your car’s ECU software to program the exhaust actuators to remain open or based on other variables. However making changes to your car’s ECU software can cause major and expensive problems so please contact a recommended tuner for advice.

 

4. Exhaust Controllers

Installing an exhaust controller is very similar to installing blanking plugs, however, this time the car will need to be off before starting.

 

For All Other Exhaust Controllers

Step 1: Prepare your car

  • Turn off your car before starting.
  • It is recommended to leave your car locked and completely off for about 10 minutes with your keys away, to allow time for the car to completely shut off.
  • Depending on your car, you may prefer to lift your car using a jack or on ramps to better access the exhaust valves.

Step 2: Unplug connectors

  • Remove the connectors from the exhaust valve actuators.

Step 3: Install the exhaust controller

  • Connect the two ends of the exhaust controller. One side going to the actuator and one side going to the connector that was removed in the previous step.
  • Repeat for the other side if your exhaust has two valves.

Step 4: Secure the module

  • Following the manufacturer’s recommendations, either zip tie or use mounting hardware to secure the module to a safe spot on the car.
  • Be sure to avoid placing too close to any heat sources such as the exhaust.

Step 5: Tidy up

  • Cable tie the cables between the module and the connectors on the car in a place that will prevent rubbing on anything sharp and away from touching anything hot.

Step 6: Test

  • Turn on your car and test the exhaust controller functions using the remote and confirm everything is working as expected. Listen for changes in the exhaust note and ensure there are no error codes or unusual sounds.

Note: Keep your remote handy, and if any error codes appear or the valves don’t respond as expected, recheck the installation steps or consult the manufacturer. For safety and peace of mind, professional installation is always recommended.

 

11MODE Exhaust Controllers

One of the major advantages of 11MODE exhaust controllers is the simpler installation process. There are no wires or modules so there is no need to struggle with cable management or mounting modules. Installation can be done in just a few minutes.

Step 1: Prepare your car

  • Turn off your car before starting.
  • It is recommended to leave your car locked and completely off for about 10 minutes with your keys away, to allow time for the car to completely shut off.
  • Depending on your car, you may prefer to lift your car using a jack or on ramps to better access the exhaust valves.

Step 2: Unplug connectors

  • Remove the connectors from the exhaust valve actuators.

Step 3: Install the exhaust controller

  • Plug the connector removed in the previous step into the exhaust controller.
  • Plug the exhaust controller into the actuator.
  • Repeat for the other side if your exhaust has two valves.

Step 4: Test

  • Turn on your car and test the exhaust controller functions using the remote and confirm everything is working as expected. Listen for changes in the exhaust note and ensure there are no error codes or unusual sounds.

For a more detailed installation guide and video, check out the how to install page here.

 

 Section Summary

Answers to some commonly asked questions about installation are summarized here:

1. How to install an exhaust controller?
Installation of blanking plugs and exhaust controllers are quite similar and the process is straightforward. It just involves removing the actuator connector and installing the plug or controller.
2. Do I need a professional to install an exhaust control system?
Like every other car modification, installation by a trained professional is always recommended. However exhaust controllers are simple to install and can be done yourself following the manufacturer’s guide and recommendations.
3. How do I wire an exhaust controller to my car?
Depending on the exhaust controller model, some require you to run and plumb vacuum hoses, and some require you to tap into power and ground lines to install. However many exhaust controllers are simply plug and play and require no wiring.
4. Which exhaust controller is easiest to install?
The 11MODE exhaust controller is the easiest to install as it requires no tools and no cable management. There is no need to run wires and no control module to mount.

With the installation complete, you now have full control over opening your exhaust valves. Enjoy the flexibility to customize your exhaust sound based on your mood or driving environment at the press of a button. If you decide on this exhaust controller option, in the next section, we’ll share which cars it suits and how to find the right model for your car.

8. What Cars Do The 11MODE Exhaust Controllers Work For?

We offer exhaust controllers to suit over 1,000 different car makes, models and years. Below is a list of just some of the cars that the 11MODE exhaust controller suits:

 These are just some of the more popular cars that our exhaust controllers work for. You can search for your exact make and model using our car finder tool here. If you can’t find your car, get in touch with us here and we can assist you.

 

Section Summary

1. Do exhaust controllers work on all car models?
You can find an exhaust controller for almost any car with an active exhaust system, but they are specific to particular makes and models. Be sure to check that the product suits your car.

9. Common Questions People Have

1. How do I fully open my car’s exhaust valves? How do I keep them open?
We hope we have answered this question in detail in the “How do I open my Exhaust Valves?” section of this article.

2. My car already opens the valves, why do I need an exhaust controller?
Active exhausts don’t actually keep your exhaust valves open all the time. They actually close at certain RPMs and engine loads even in race, track or sport modes. For more information, check out “How Exhaust Valve Systems Work” above and “Why You Might Want To Control Your Exhaust Valves Manually”.

3. I have an aftermarket exhaust, can I still control the valves?
If your aftermarket exhaust retains your factory exhaust valves, then the Exhaust Controller will still work. If your car normally has only one valve but the aftermarket exhaust now has two valves, you need to make sure the exhaust controller product you buy has two valve connections..

4. How do I install an exhaust valve controller?
Depending on what option you choose, installation could be very easy or more involved. Exhaust controllers are typically very easy to install and require either basic tools or none at all. Check out the “How Do I Install It?” section to see more.

5. How long does it take to install?
This depends on which option you choose and what car you have. For our exhaust controller for example, installation could take less than 10 minutes with no tools required.

6. Does it suit my car?
There are many exhaust controller options on the market for almost any car with an active exhaust system. You’ll have to search for your exact make and model to make sure it is compatible. For 11MODE exhaust controllers, you can see a list of best selling exhaust controllers in the “What Cars Do These Exhaust Controllers Work For?” section above. Or you can use our car finder tool here
.
7. How can I tell if I have electric or vacuum actuators?
You can tell if you have electric or vacuum actuated exhaust valves by inspecting the cable or hose coming from the actuators. The manufacturer year is another way you can tell, as cars prior to the mid 2010s typically have vacuum actuators, whereas afterwards the majority are electric. For more details, take a look at the “Exhaust Valve Types” section above.

8. How can I learn more about 11MODE Exhaust Controllers?
You can visit our FAQ page here or send us a message and we will be glad to assist you however we can.

10. Conclusion: Enhancing Your Driving Experience

Gaining control over the exhaust valves in your car isn’t just about sound; it’s about tailoring your driving experience to suit any occasion. Whether you’re looking for a quieter, more refined ride through your neighborhood or unleashing that open exhaust note on a spirited drive, these solutions give you the flexibility you need.

From always open blanking plugs to installing aftermarket controllers or exploring advanced ECU tuning, you have options to match your preferences and technical comfort level. Just remember to weigh the pros and cons of each approach and consult a professional to ensure a safe, seamless setup. With the right exhaust valve controller, you can experience your car exactly how you want, every time you drive.

Find the easiest to install and most affordable exhaust controller for your car at 11MODE. Loud when you want, quiet when you need, at the press of a button. When you choose 11MODE you're not just purchasing an Exhaust Controller, you're investing in a personalized driving experience.

Turn your exhaust to eleven today!

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