What Is Muffler Delete (How Much Will It Cost)

Muffler delete is a popular way of giving your car a louder sound. But while it is one of the most popular ways, it’s not the only way to make your exhaust louder.

Muffler delete is becoming more popular, there are still some things you should be aware of. Continue reading to learn everything you need to know about muffler delete.

While muffler delete and straight pipe exhaust systems are mostly used interchangeably, they are not the same thing.

Straight pipe delete eliminates both the catalytic converter and the muffler. Mufflers delete only the muffler.

Also Read: 700R4 Transmission – Everything You Need To Know

Muffler Delete Pros

Muffler Delete Pros

The following are the pros of muffler delete

1. More Horsepower at high engine RPMs.

This is true even for older cars and vehicles built between 15 and 20 years ago. Any car that has undergone muffler delete will have an increase in exhaust flow and a reduction in the engine’s backpressure.

Older style mufflers can be more restrictive than modern mufflers. Muffler deletion can be beneficial for older cars and old race cars.

This makes the vehicle sound stronger and gives you more horsepower and torque at high speeds.

This is true even if you’re talking about a brand new or modern vehicle.

Technology has advanced a lot, and muffler systems are now available to carmakers that improve exhaust flow and don’t make a lot of noise.

Most times, a muffler deletion or set of aftermarket (or axle-back) mufflers will cause more damage than good and produce less Horsepower.

The ECU will go into LIMP mode if the muffler is removed. This can be seen by the check engine light at the console.

2. Better (Aggressive) Exhaust Sound.

Although this is subjective, some people like the sound of their car better after muffler delete. Straight pipes give your vehicle a powerful rumble.

A muffler delete will open the exhaust system’s taps, which will produce louder and more aggressive sounds.

This sound can even be addictive for some people, as it gets better the deeper you dig the pedal.

For enthusiast drivers, the popping backfiring sounds are great ear candy. But be aware that your neighbors might not appreciate the 402 cu in (6.6 L) straight-piped big-block roaring down their street at 02:00 AM. 

Muffler Delete Cons

Muffler Delete Cons

Removing a Muffler is a popular choice for vehicle enthusiasts. However, it’s not without its cons. We’ve listed four possible issues that you will need to address if you do a muffler deletion.

1. Much Louder Exhaust

Loud vehicles without a muffler can be dangerous. Besides this fact, it can be quite annoying when you are on long road trips.

This is especially true if your vehicle travels at higher RPMs and has more exhaust.

While you might have no issue with the increase in your vehicle’s sound, others can see it as disturbing. Also, hearing the noises on the road too as you drive can be annoying.

2. Can reduce Engine Performance

Wait, Did we not mention increased engine performance as a pro too? We did. While a muffler deletion can increase top-end Horsepower in older vehicles, it can also have the opposite effect on newer models.

The manufacturer tunes the ECM so that the newer mufflers work well with it.

Not only will you likely increase some loss in engine performance with a muffler deletion on a newer vehicle, but you’ll likely get a check engine light too.

Although it may not seem like an important issue, if any problem does occur, your car will not be able to notify you to check it before the situation worsens.

3. Inspection/Emissions Failure

Be sure not to do a muffler delete if it could cause you a problem when a vehicle emission or inspection has to be conducted.

You may fail an emission test if your car encounters an engine code, resulting in incorrect results.

Sometimes, the technician may see your mistakes and report back to you. You will need to return all stock equipment if you have to pass inspections on your vehicle.

4. It Is Illegal

Let’s be clear, if you want to do a muffler deletion on a vehicle that you will be driving, you are breaking the law.

Although it is unlikely you will be pulled over, removing the muffler in your vehicle could mean that you will be violating various noise policies.

Also, you might find it difficult to get find a mechanic that can perform a muffler delete and is willing to do it. This is because muffler delete is illegal on cars that are driven on public roads.

Is A Muffler Delete Illegal?

Is A Muffler Delete Illegal

Yes, muffler delete is illegal. No matter where you live, it is illegal for cars on public roads to remove their mufflers.

However, there’s nothing to be afraid of, given that your car sound does not go beyond the state policy or local noise regulation.

It is possible to be ticketed for a muffler deletion, but you will likely get a ticket because of excessive vehicle noise and not the muffler deletion.

If a cop who knows his job pulls you over, there is a possibility you could get more than one ticket.

Also Read: GDI Engine – Everything You Should Know

How To Do A Muffler Delete

If you want to know how to do a muffler delete yourself because you can’t find a mechanic to do it for you, follow the steps below.

  1. Use a car jack to lift the car
  2. Locate the muffler near the exhaust pipe area
  3. Unscrew the muffler clamp
  4. Carefully remove the muffler
  5. Install a fabricated or straight pipe
  6. Install a loud exhaust tip(Optional)
  7. Tighten the new pipe to the exhaust hanger with bolts and clamp
  8. Turn on the vehicle and test the sound

Watch this video to see how to do a muffler delete

Frequently Asked Questions

Is it bad to do a muffler delete?

Muffler Delete will not damage your car or cause engine damage. Poor welding can lead to exhaust leakage or rusting. Contrary to popular belief, muffler delete does not increase horsepower. It only makes your exhaust very loud.

How Much Is A Muffler Delete?

A muffler pipe to remove a muffler can be priced between $50 and $250. The demand for it will range from $100 to $200, depending on the experience. The price of a muffler removal varies depending on the brand, vehicle, and location. This muffler delete is for off-road use, but it is not allowed on public roads.

Does removing Muffler add horsepower?

Muffler delete will not add any horsepower to most vehicles. However some older cars might get a little power after a muffler deletion but it won’t be much, usually around 5 horsepower. Removing a muffler of a car only increases the sound.

Is a muffler delete the same as a straight pipe?

A muffler deletion is the removal of your stock muffler and installing an exhaust pipe without a muffler in its place. Straight pipes can be used to refer to muffler deletion but can also refer to the removal of everything else in an exhaust system.

What is the point of a muffler delete?

Louder car sound. A muffler deletion increases the sound from a car to a more roaring sound. Removing a vehicle’s muffler can significantly improve the car’s exhaust flow and might increase the engine’s horsepower given by the car’s engine.

Does Muffler delete affect gas mileage?

Muffler delete will not affect gas mileage. The Muffler is a sound suppression device that reduces the intensity of sound waves caused by combustion. If you’re looking for information before doing anything, don’t worry. The muffler deletion will not affect your gas mileage.

Will a muffler delete pass MoT?

It passed without any problems. A few C63 owners have uploaded recordings of their cars’ exhausts. Some of these are antisocially loud, but they appear to pass the MoT test okay.

What is better, a muffler delete or straight pipe?

A straight pipe is a great way to improve your vehicle’s sound and performance without spending a lot of money. A muffler delete is a better option if you are willing to spend more. They will achieve the same goals in either way.

Does Muffler delete to make a car faster?

A perfect muffler removal can increase car performance. If there is no junk in the exhaust, horsepower can increase.

Which is better, muffler delete or resonator delete?

Muffler delete is the most common modification. It sounds louder and can increase your vehicle’s mileage by reducing its weight. Some might argue that resonator delete alters the car’s original sound, making it louder and more distinctive.

Does Muffler delete void warranty?

No, it doesn’t. A muffler deletion will not void your car’s warranty. Dealers must prove that your modification caused the problem to void your warranty.

Does no muffler affect performance?

Mufflers can reduce noise, but at the expense of fuel economy and horsepower. Removing a muffler will increase Sound and might increase engine performance.


Muffler Delete refers to the removal of the muffler from a car’s exhaust system. It is a popular way of giving a vehicle a louder sound.

Before you carry out muffler delete on your vehicle, check the laws of your location as it regards this and also be sure the vehicle won’t be driven on public roads because the loud roaring sound could not sound pleasant to other road users

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