How Much Horsepower Does Exhaust Add? (Explained!)

Many people ask how much an exhaust adds in terms of horsepower. If you have the same question, this article is definitely for you because we will be talking all about exhaust and how much horsepower it can add. So stay and keep reading!

So how much horsepower does exhaust add? An aftermarket exhaust can increase horsepower by increasing the amount of air in the combustion chamber. You can assume that you can get two percent to five percent more power.

As a car driver, you should be able to know about the components of your vehicle and many other things that contribute to the power of your vehicle. With that, this is why a lot of people are asking how much horsepower does an exhaust add. 

Exhaust does add horsepower but many car drivers do not know how much horsepower an exhaust adds. With that, we have made this article to bring some enlightenment. You will be able to know all about exhaust and how much horsepower it can add. 

In this article, we’ll talk about how much horsepower does exhaust add. This is one of the most asked questions of car drivers. If you always wish to know the answer, stay for a very informative read. Let us get started.

How Much Horsepower Does Exhaust Add

Does Exhaust Increase Horsepower?

Yes. An aftermarket exhaust can give you some additional horsepower. They do this by giving a better airflow for the exhaust gases to escape the combustion chamber. It will give more room for fresh air, and it will make effective combustion. 

The exhaust will allow the exhaust gases to exit the combustion chamber. Exhaust can also give you a better sound for your engine. Your engine will deliver power by mixing fuel and air in the combustion chamber. 

It will then make combustion. The air will then be sucked from the surrounding, and the fuel will be injected in. 

How Much Horsepower Is Added With Exhaust?

Increasing horsepower is to increase the amount of fresh air in the combustion chamber. The air will create more powerful combustion. This will deliver more power to your wheels. 

An aftermarket exhaust can increase horsepower by increasing the amount of air in the combustion chamber. You can assume that you can get two percent to five percent more power.

How Much Horsepower Does A Cat Back Exhaust Add?

You can gain twelve horsepower in a cat-back exhaust system. In general, you can expect a two percent to five percent increase in your torque, fuel mileage, and horsepower. The amount will also depend on the experience and how restrictive your stock exhaust can be. 

A cat-back exhaust has massive tubing and mufflers. It is made to increase the exhaust flow, and they will work with the stock headers, cars, and downpipes. If the stock catalytic convert might be too restrictive, you can gain horsepower that has a high flow catalytic converter. 

How Much Horsepower Does Dual Exhaust Add?

Each vehicle is different from one another. However, when it comes to horsepower, you can expect an addition to a dual exhaust. Many manufacturers of an aftermarket dual exhaust system are stating that they can increase fifteen percent to twenty percent in horsepower or hp. 

How Much Horsepower Does Borla Exhaust Add?

The ability of the engine to create and offer horsepower will depend on the quantification of the air or fuel mixture or the ratio of air mixture or fuel mixture that is flowing to the combustion chamber. This is where it is ignited and exhaust gases are expelled. a Borla exhaust system is made to have an optimal diameter and a low restriction flow. 

It promotes scavenging. So most of the time, you’ll gain in the range of eight horsepower to twelve horsepower. Sometimes, it can also be higher. 

But all the applications are unique. There can also be differences in the outcome and the effects. So it is not wise to give an exact number.

How Much Horsepower Does Magnaflow Exhaust Add?

If we talk about the muffler, you need to understand that an upgrade to a cat-back system as a whole can be the only way that you can experience firsthand the noticeable power gain. You can upgrade the muffler on your own and if it can be a rusted out mess. Then you have to replace it. 

Magnaflow exhaust is an aftermarket exhaust manufacturer. They said that their customers could expect that they can gain horsepower of around ten percent. 

This is a familiar figure. But the Magnaflow said that this is not a guarantee. With that statement, it is safe to assume that the results can still vary. 

How Much Horsepower Does Flowmaster Exhaust Add?

A lot of people are always thinking about how an exhaust system can allow for more horsepower. They ask these questions again and again. The answer is simple, though. 

The engine that is more efficient to move the air, the higher the horsepower will be. The function of the exhaust system will be to remove the contaminated air from the engine of the vehicle. The Flowmaster engine stated that they could do it better. 

This will draw in more air every time, and it will help filter out the toxic air in a fast manner. The Flowmaster exhaust system said that they could add about eight horsepower. This is about a ten percent gain so that we can increase the performance of your vehicle. 

A muffler provides help in the increase of horsepower because it will decrease the resistance of the air. That will make it easier for the exhaust fuels to go out of the cylinder, and the air will flow better.

How Much Horsepower Does MBRP Exhaust Add?

The bolt-on system sound and the impact of the three-inch tubes and their high flow mufflers on performance are currently being evaluated. However, the MBRP claims they can add about approximately three horsepower to five horsepower in the feet. 

How Much Horsepower Does Corsa Exhaust Add?

A Corsa exhaust can add about twenty horsepower. Although this is the highest of them all, it would still be best to consult experts about this. This horsepower is too high, and only experts can validate whether this is valid.


In summary, a lot of people are asking about the horsepower that exhaust can add. Many car drivers want an excellent gain in terms of their horsepower. 

With that, a lot of car drivers give more attention to the additional horsepower. The guide above can help you with the questions about horsepower.

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Image credits – Canva

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My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more