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How to Make Exhaust Louder (Explained)

Updated: Jan 8

There are many car enthusiasts who want to make their exhaust louder. This can give a more aggressive and sporty look to their vehicle.


However, before you make any modifications to your exhaust system, it is important to understand the potential consequences and ensure that it is legal in your area.


In this article, we will discuss the various options on how to make an exhaust louder and the pros and cons of each method.

 

Table of Contents:


exhaust system on a car

How to Make Exhaust Louder

There are several ways to make an exhaust louder, such as the following.


  1. De-cat your exhaust: Removing the catalytic converter from your exhaust system can make it louder. The catalytic converter is responsible for reducing the harmful emissions produced by your vehicle, so removing it can potentially have negative effects on the environment.

  2. Remove the muffler from your exhaust system (muffler delete / back-box delete): The muffler is responsible for reducing the noise coming from the exhaust. Removing it can make your exhaust louder.

  3. Straight pipe your exhaust: Removing all restrictions from an exhaust system and replacing them with a straight pipe can also increase the exhaust noise. This involves removing the catalytic converter, mufflers, and resonators and replacing them with a pipe that goes straight from the engine to the tailpipe.

  4. Drill holes into the exhaust: Drilling holes into your exhaust before the muffler or resonator can increase the noise, but it can also make the sound rattly and low-quality.

  5. Install a cat-back exhaust system: A cat-back exhaust system replaces the pipes from the catalytic converter to the muffler and can increase the exhaust noise, this is usually the best way to make your exhaust louder.

  6. Install a sports catalytic converter: A sports catalytic converter is designed to allow a higher flow of exhaust gases, which can increase the noise of the exhaust.

  7. Install a new down pipe: The down pipe is the part of the exhaust system that connects the exhaust manifold to the catalytic converter. Installing a new, larger down pipe can increase the exhaust flow and also noise.

  8. Use a fake exhaust sound speaker system: These systems use speakers to play a recorded exhaust sound and can be mounted inside the vehicle. While they can increase the exhaust noise, they do not actually modify the exhaust system and may not provide a realistic sound.


Is Making Your Exhaust System Louder Legal?

The legality of modifying your exhaust system to make it louder varies by location. In some areas, it is illegal to remove the muffler or catalytic converter or to modify the exhaust system in any way that increases the noise level beyond the manufacturer's specifications.


It is important to check the laws in your area before making any modifications to your exhaust system.


Is It Legal to Straight Pipe or De-cat Your Car?

In many areas, it is illegal to remove the catalytic converter or straight pipe your vehicle. The catalytic converter is required by law to reduce harmful emissions, and removing it can result in significant increases in pollution.


Straight piping your exhaust can also increase the noise level beyond the legal limit.


Benefits of Making Your Exhaust Louder

  • Increased horsepower: Some modifications designed to make your car louder may also improve performance and increase horsepower (such as the de-cat or straight pipe).

  • Improved sound: Many car enthusiasts enjoy the aggressive and sporty sound of a louder exhaust.


Drawbacks of Making an Exhaust Louder

  • Increased noise: A louder exhaust can be annoying to those around you and may be illegal in your area.

  • Decreased fuel efficiency: Modifying the exhaust system could result in a decrease in fuel efficiency if it affects the way the oxygen sensor works and the data it receives (such as a de-cat exhaust).

  • Potential damage to the exhaust system: Making modifications to the exhaust system can potentially damage it or cause it to fail prematurely.

  • Legal consequences: Modifying the exhaust system to make it louder can be illegal in some areas, and you may face fines or other legal consequences if caught.

  • Environmental impact: Removing the catalytic converter or straight piping the exhaust can significantly increase the emissions produced by your vehicle, which can have negative effects on the environment.


Conclusion

Overall, while making your exhaust louder can give your vehicle a sportier appearance and improved sound, it is important to weigh the potential benefits and drawbacks before making any modifications.


Make sure to check the laws in your area and consider the potential impact on the environment and those around you.


In some cases, it may be better to simply invest in a quality aftermarket exhaust system that provides the desired sound without breaking the law or causing potential damage to your vehicle.

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