3 Perfect Methods On How To Make BMW 328i Louder

Regardless of BMW 328i’s raw prowess, some are just not satisfied with the exhaust sound. Well, it’s true that there are some easy ways to make the exhaust sound louder. 

So, how to make BMW 328i louder?

There are 3 ways that you can make your BMW 328i louder. Firstly you could use the muffler delete. Secondly, you could use the resonator delete. Or lastly, you could use the secondary catalytic converter delete. These are the 3 easiest and cheapest ways that you can make your BMW 328i louder.

We’ve elaborated on these methods throughout this article. Do stick with us till the end to find what you’re looking for. 

So, let’s dig in. 

3 Methods to Make BMW 328i Louder

Like many car enthusiasts, you might want to modify your BMW 328i to sound louder. You want to hear that beast roar! 

Usually changing the car’s exhaust system is the way most people go. But you should consider that it’ll be quite expensive. It could cost you around $500-$2000. It’s quite a lot, isn’t it? 

Don’t lose hope yet. We’ve got you covered. We can show you how to make your BMW exhaust sound louder without spending as much. How?

Let’s have a look. 

Method 1 of 3: Muffler Delete 

A muffler is a noise reduction device that is installed in the exhaust of a vehicle. It dampens the sounds generated by the vibration of an internal combustion engine.  

A muffler delete procedure could be done for different reasons. But, what serves our purpose is that a muffler delete increases the exhaust sound.

Your BMW 328i exhaust will sound like it’s roaring after a muffler delete. Just remember that the sound may feel overwhelming at faster speeds. 

Also do remember that there are pros and cons of a muffler delete

A muffler delete is not that complex to do. But we recommend you to go to a car professional for it. 

However, if you want to save some cash and do it at home then we’re here to help. A muffler delete cost is around $150-$450. 

Let’s have a look at the step-by-step procedure of how to do a muffler delete. 

Step 1: Jack Up the Car

While in a stationary position, you need to lift the car. You need to use a jack to lift the car. 

Make sure to have sufficient space below the car for you to get in and work.

BMW 328i exhaust
Source: youtube.com

Step 2: Find the Muffler

You should find the muffler near the exhaust pipe. The pipe is always connected to a big chambered box. 

It might be welded, fastened with an exhaust bracket, or flanged together.

Step 3: Detach the Muffler

Usually, the muffler is fastened with an exhaust bracket or clamps. The easiest procedure is unscrewing the clamps. 

But sometimes the muffler could be welded. In this case, you’re gonna have to use a saw to cut it off. 

Step 4: Mount a Pipe

Then you need to attach a muffler delete pipe. You can easily find some premium quality pipes on both online and retail stores. SYKRSS Exhaust Muffler Tail Pipe and LCGP Plating Exhaust Tip 1 Pair are some great ones!

Or you can check out 1 Pair Car Exhaust Tail Pipes Muffler Tips as well. These all are excellent performers in the low price range.

Using a fabricated pipe is the best alternative. Just make sure that the pipe’s inlets and outlets match with the ones with the muffler. 

Step 5: Screw the Bolts

After placing the fabricated pipe in the accurate position you need to screw the bolts. Once you’re done fixing it you’re about done. Then it’s time for you to test it out. 

If it’s successful then it’ll make your BMW 328i pop

Method 2 of 3: Resonator Delete

A resonator delete is a change that modifies the outflow of vibrations created by your vehicle. Especially as they pass through the exhaust system. It resembles a big echo chamber. 

You can say it’s a BMW exhaust upgrade. 

The resonator erases the frequency of the vibrations generated by your vehicle. This results in increased power output. It has the potential to make your BMW’s exhaust sound powerful. 
The resonator delete procedure could be a little tricky if you don’t know what you’re doing. So make sure you do it right.

Source: youtube.com

Resonator delete procedure cost is relatively very cheap. It’ll cost you around $100-$140 on your BMW. 

Let’s have a look at the step-by-step procedure of how to do a resonator delete.

Step 1: Jack Up the Car

First, you need to lift the car using a jack. Jack up enough for you to get below the car and work. 

Also, make sure the car is in a stationary position. 

Step 2: Find the Resonator

Then you need to locate the resonator. 

The resonator is located just near the catalytic converter. You’ll find it before the car’s muffler. 

Step 3: Cut the Exhaust Pipe

Make sure you’re wearing your protective gear for this step. 

You need to saw the pipe first about 2 inches ahead of the resonator. Then do the same thing 2 inches rear to the resonator. 

After that, you should be able to take out the resonator. 

Step 4: Join the Exhaust Pipe Back

Finally, you’re gonna have to attach the pipe back. 

There are 2 ways you could do it. First, you can weld it. Or second, you can use exhaust clamps to fix it. 

After joining, you’re ready to test it out. 

Method 3 of 3: Secondary Catalytic Converter Delete

Catalytic converters are devices that contain a catalyst. This catalyst helps to convert polluted gas into less harmful gas.
Do note that secondary catalytic converter delete could result in gas coming out of the exhaust.

Secondary Catalytic Converter
Source: bimmerpost.com

There are usually 4 catalytic converters in a BMW’s exhaust system. 2 primary and 2 secondary catalytic converters.  

The secondary catalytic converter delete procedure has a similar process to the muffler delete. As well as the resonator delete. 

And it’s quite cheap. Secondary cat delete costs around $100. And a plus side of this is you can sell these catalytic converters. 

Let’s have a look at the step-by-step procedure of how to do a secondary cat delete. 

Step 1: Jack Up the Car

First, you’re gonna have to raise the car so that you can work with the exhaust. 

Make sure the car is in a stationary position.

Step 2: Find the Secondary Cat

Then you need to find the secondary cat. 

You’ll find the catalytic converter between the resonator and the primary catalytic converters. 

Step 3: Cut off the Secondary Cat

In this step, you need to use a saw to cut off the secondary cats. But remember the cats could be attached with an exhaust clamp. 

If that’s the case then just unbolting the clamps should do it. 

Step 4: Weld the Exhaust Pipe Back

Once you’re done removing the cats, you need to attach the pipe back together. 

For this, you need to weld the pipes back together. You should consider taking out the entire exhaust system first for better welding. 

But it works just fine while it’s attached to the car. 

Then you’re ready to test it out. 

Make sure not to damage your primary cat converters. Because a bad catalytic converter causes o2 sensor failure.

Frequently Asked Questions (FAQs)

Is Muffler delete illegal? 

Yes, muffler delete is illegal. It is prohibited to remove the muffler from a car going on public highways. There is a  widespread misperception regarding this. That is you’ll be OK as long as your automobile noise is within the limits. Enforced by state or municipal noise rules. This is not true.

Can you reverse Muffler Delete?

Yes, You can reverse a muffler delete. Although it is a bit of a tricky process. First, you need to recut your exhaust system where the muffler originated. Then you need to make space to place the muffler back again. Then you have to weld it back again. Or use exhaust clamps to fix the mufflers. 

Does resonator delete increase the car’s performance? 

Yes, resonator delete helps to increase the performance of your car. Resonator delete doesn’t only increase the sound from the exhaust. It also assures that exhaust gasses travel quicker. This increases your car’s ability for reduced fuel consumption. which improves its performance and economy.


Hopefully, by now you’re clear about how to make BMW 328i louder.

A bonus tip for you is to regularly clean the exhaust pipe for better performance. 

That’ll be all from our side. So, happy riding!

Robert Lozano

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