Resonator Delete: Meaning, Process, Pros, and Cons

The resonator is one of the most important parts of your exhaust system. The main function of the resonator is to modify and fine-tune the sound produced by the combustion process of your engine before it reaches your muffler. The resonator delete is a famous method. Most mechanics recommend resonator deletion because it improves engine performance. There are different pros and cons of resonator delete.

Are you also thinking of deleting the resonator on your car? This article deeply describes the resonator delete cost, and its pros and cons.

What Is a Resonator Delete?

The resonator delete is a famous method in which the resonator part is deleted to change the direction of the exhaust pulses as they pass through the exhaust system of the car.

Resonator Delete

The removal of the resonator lightens the car weight and changes the exhaust sound. The resonator delete is a legal method that requires little maintenance and doesn’t significantly affect the muffler setting. But the removal of the resonator may violate your car warranty, cause droning noise, limit flow, affect engine efficiency, or illumination of the check engine light.

The resonator deletion differs from muffler deletion, in which the muffler is deleted instead of the resonator. But both methods have a lot of the same pros and cons.  

What is a Resonator?

One of your car’s most sophisticated systems is the exhaust system. An exhaust system comprises several components, including the manifold, flex pipe, catalytic converter, isolators, mufflers, and resonators.

A resonator is a component of the exhaust system. A resonator is installed behind the muffler to muffle the exhaust noise, making the vehicle inaudible. The main function of the resonator is to reduce noise but limit the engine performance a little in the process.


The resonator is usually installed in the form of a larger cylinder and is easily visible from under the car. The resonator restricts your vehicle, but resonator delete does not.

Pros and Cons of Resonator Delete

The pros and cons of the resonator deletion are given below:

Pros of Resonator Delete

The advantages of the resonator delete are given below:

1) Changes Vehicle Sound

When you delete the resonator, you will hear a stronger noise. This sound gets more real and develops a totally distinctive exhaust tone that sounds like a sports car. 

Even though the resonator delete won’t significantly change the sound, but it is audible. This sound also depends on the muffler size. If your muffler is larger, the less noise you might observe after the resonator delete.

2) Improve Fuel Economy

The removal of the resonator also helps to improve fuel economy. 

3) Legal Modification

One of the main advantages of resonator delete is that it is legal. In most countries, it is acceptable to make changes in your exhaust system after the catalytic converter. But changes before the catalytic converter are not allowed.

Most countries don’t care if you remove the resonator as long as you aren’t altering the car’s emissions profile. But you should conduct your own research before removing the resonator because certain countries don’t permit any type of changes in the exhaust system. 

4) Improve Engine Power 

An improvement in the engine power is one of the major advantages of the resonator deletion. The resonator deletion usually results in a 5 horsepower increase for the vehicle.

The resonator deletion would eliminate any excessive soot buildup or blockages in your car’s exhaust system, increasing your car’s engine horsepower and resulting in a slight improvement in fuel economy.

5) No Modifications in Muffler

There is no need to modify the muffler while deleting the resonator. You don’t need to make any changes even if your vehicle currently has dual exhaust.

6) Minimal Maintenance

Removing the resonator also reduces the need for exhaust system maintenance.

There is nothing further you need to do after completing the resonator delete. Nothing in the car will require maintenance or inspection once the changes are done. Also, there shouldn’t generally be any performance difficulties. However, your vehicle check engine light may start to illuminate after the removal of the resonator.

7) Reduce Vehicle Weight

One of the major advantages of resonator delete is that it reduces vehicle weight. The performance of your vehicle can be improved by reducing its weight. As a component is removed, your car weight automatically reduces. 

If your car has two exhaust resonators, it means you are saving roughly forty pounds by removing these resonators. Even while this might not seem like a significant shift, every pound counts when performance is at stake. It is reasonable to anticipate a minor improvement in engine performance.

Experts claim that the resonator delete may increase your engine power from 3 to 5 horsepower. This amount of power change won’t be immediately apparent, similar to the weight advantage mentioned above.

Cons of Resonator Delete

The disadvantages of the resonator delete are given below:

1) Check Engine Light Illumination

The exhaust system, which can be closely monitored in the latest vehicle models, contains a resonator. As discussed earlier, the performance of the catalytic converter may be affected when the resonator is removed.

When the performance of the catalytic converter is affected, the check engine light of your vehicle starts illuminating. However, your catalytic converter is still in place; therefore, your car won’t fail an emissions test. Yet, you might find it inconvenient to drive with the Check Engine Light on.

2) Less Power

In rare circumstances, removing the resonator could result in a little power loss. This condition occurs because the engine works harder to generate the same amount of power.

The resonator may improve exhaust flow, which the manufacturer determined to be advantageous for engine power output.

3) Decrease Exhaust Flow Speed

The latest vehicle models have pistons to force the exhaust gas out of the combustion chamber so that new fuel and air mixture can be injected into it. The resonator is required to boost this process’s force and help the gases in moving more quickly.

With a resonator, sound waves assist in emptying the engine cylinder and make room for the fresh fuel-air mixture.

The vacuum pressure created by the resonator improves with increasing wave strength. These sound waves are lost when the resonator is removed, which results in decreased pressure. The exhaust flow speed is thus somewhat decreased.

4) Louder Sounds

After removing the resonator, your car starts making extreme noise. This is one of the major disadvantages of resonator delete.

The resonator of your car has the responsibility to eliminate the whining noises that develop when traveling for long distances at a higher speed. You can easily hear this sound at 3,000 to 4,000 RPMs.

The droning noise becomes more noticeable when the resonator is removed. At various RPMs, you could also hear some rattling or screaming noises from the exhaust system, but usually, they are not too loud.

Both low- and high-frequency droning noises cause the production of an extremely buzzy exhaust that is unbearable and produces noise pollution. 

5) Idling Issues

The old vehicle models may experience idling troubles after a resonator deletion procedure because idling issues are typically caused due to a bad catalytic converter.

The performance of a car’s catalytic converter is typically impacted by the resonator delete process, which causes an idling problem in the vehicle. Usually, dirty fuel injectors block air filters, and corrosive spark plugs cause idling problems in your vehicle.

6) Chances of Warranty Nullification

You could still be covered by a warranty if you drive a newer vehicle. The warranty could be voided if the exhaust system is modified. Depending on what goes wrong, you can be looking at a sizable expense if you have to pay for repairs out of pocket.

Most of the time, the complete warranty will remain in effect. Legally, automakers may only refuse warranty coverage if the change directly contributed to the failure of the item.

Read More: EGR Delete Pros and Cons

Resonator Delete Cost

The cost of the resonator delete depends on the vehicle model and the labor cost. If utilizing aftermarket parts, the average cost of resonator deletion is from $95 to $205.

You might have to spend a little bit extra amount if welding is needed. Moreover, the cost can be double if you’re taking out two resonators.

Yet, if you have the necessary equipment and a length of pipe at home, removing a resonator is not difficult. You may save a lot of money by doing it yourself. 

How to delete a Resonator?

You won’t need to set aside all day to do a resonator clean; it should only take an hour. If you have access to a resonator deletion kit, it will also be helpful.

Follow the below-given steps to do a resonator delete:

  • Park your car
  • Lift your car
  • Locate the resonator
  • Cut the exhaust pipe
  • Remove resonator
  • Weld pipe
Step 1: Park your Car

First of all, park your vehicle on a flat surface and turn off your engine. Let the engine cool down. Your car must be in neutral mode.

Step 2: Lift your Car

Before removing the resonator, your automobile must be jacked up and properly supported by jack stands. Ensure you have access to whatever must be removed from beneath the car.

Lift the car

Step 3: Locate the Resonator

After lifting the car, locate the resonator. To find the resonator quickly, you should check your vehicle manual. It is usually located after the catalytic converter, just before the muffler.

Resonator location

If you want to delete both resonators from your vehicle, you must find them before moving forward.

Step 4: Cut the Exhaust Pipe

Use necessary PPES (such as safety gloves, safety glasses, and earplugs) before cutting any pipes. The tailpipe should then be cut 2 inches before the resonator and 2 inches after using a saw blade.

Cut the Exhaust Pipe

If your car contains two resonators, you will have to perform double the number of cuts. 

Step 5: Remove Resonator

Gently remove the resonator from the exhaust system and disconnect it. If your resonator is creating problems to come out, you may have cut all the way through.

Step 6: Weld Pipe

After deleting the resonator, solder the tailpipes into place. The next step is to weld the tailpipes together. If you don’t know how to perform welding, you should contact a professional.

Weld exhaust Pipes, how to do resonator delete

You may also use an exhaust clamp kit to clutch the joints together, and then it is fastened with bolts on both ends.

Difference between Muffler Delete and Resonator Delete

The main goal of exhaust modifications is usually to improve vehicle sound. Both the muffler and the resonator have minimal effects on the car’s weight but no noticeable effects on the car’s fuel efficiency or horsepower.

Regarding the labor costs involved in deleting them, they are likewise equally priced. A resonator deletion, in my opinion, is a far better choice than getting rid of the muffler.

The main difference between the resonator delete and muffler delete is given below:

Resonator DeleteMuffler Delete
In the resonator delete, the resonator is removed from the exhaust system.In the muffler delete, the muffler is removed from the exhaust system.
It may produce a louder droning noise.  
The resonator is used to remove particular sound frequenciesMuffler has the ability to soften all sound frequencies.
The removal of the resonator doesn’t improve your engine power. The removal of the muffler may somewhat improve your engine power.
It may slightly affect the fuel economy. It doesn’t affect the fuel economy.
Resonator deletion is almost legal all over the world. Muffler deletion is not legal in most countries.

FAQ Section

What should you choose to do? Resonator or Muffler Delete

Now, deciding which option is best for you may be really difficult. The most common modification is undoubtedly the muffler delete since it makes a louder sound, improves engine power, and increases your car’s mileage by reducing its weight. Others may argue that the resonator delete significantly changes the distinctive sound of their original vehicle, making it meaner and louder. 

What are the Types of Resonators?

  1. Saw Resonator
  2. Ceramic Resonator
  3. Dielectric Resonator
  4. Coaxial Resonator

Is resonator delete Illegal?

The rules about the resonator deletion vary from state to state. In most states, the resonator deletion is legal. If it is also legal in your state, you are free to customize the exhaust system of your automobile. It is entirely up to you if you want to make your car sound louder by removing the muffler and resonator. Unfortunately, conducting a resonator deletion on your exhaust system is forbidden if it is registered in NSW. The authorities forbid automobile owners from altering their exhaust system such that the car makes a distinctive noise.

What is the function of the resonator?

The main function of the resonator is to prevent specific frequency sounds from emerging from the exhaust system. It works as an echo chamber that modifies the sound of the exhaust system. It gets your engine’s loud noise ready for the muffler to quiet.

Will the resonator delete pass inspection?

The exhaust sound of your automobile won’t be completely changed by resonator deletion to the point where it won’t pass inspection. The pollution from your car won’t change if you take the resonator out. It becomes challenging for you to pass inspection because the resonators only affect the sound and not pollution emission. As long as your car’s oxygen sensors are not shifted, you don’t need to worry about whether your automobile will be able to pass inspection as a result of the resonator removal.

Can resonator delete cause problems?

Yes, a resonator delete may cause different problems such as droning sounds, check engine light illumination, impair engine efficiency, reduce flow, and may void the warranty.

Is it bad to have no resonator?

Yes! A resonator is a crucial component that aids in regulating the noise produced by the exhaust system of your car, ensuring it doesn’t become excessively loud or disruptive. While your car can still function without a resonator, its absence may result in undesirable consequences such as triggering a check engine light or encountering other potential problems.

Can a bad resonator affect performance?

Yes, a faulty resonator may badly impact the performance of your vehicle engine. It may lead to abnormal engine noise, reduced power, and poor fuel efficiency. It may also cause the check engine light to illuminate, and ultimately, if left unchecked, can damage the exhaust system.

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