How to Make a Blow Off Valve Louder | Best Steps You Can Apply Now

If your car’s exhaust system emits a loud “boom” when the engine is turned off, you may need to replace your blow-off valve. But the question is How to make a blow off valve louder. There are a few ways to do this, and they all have their benefits, depending on the type of car and noise level.
We will explore these ways in this blog.

How to Make a Blow Off Valve Louder 

A blow-off valve is used in a car’s Radiator to release the pressure that builds up and prevents the Radiator from blowing up. Any blow-off valve makes a loud hissing sound. If you want to make your car’s blow-off valve louder, there are a few ways to achieve this. The method is to use a tube to modify the valve’s sound.  A blow-off valve can be modified in this way because it works by releasing excess pressure from the turbocharger system.

You’ll need to gather materials such as aluminum or silicone tubes and clamps to get started.  Remove the existing hose that connects the blow-off valve to your engine’s intake manifold. Now, attach one end of your new tube to the outlet of the blow-off valve using a clamp. 
Then run it through a hole in your engine so that it exits into an area where you want more sound to emanate from. Secure it into place with another clamp at its exit point.

How to Make a Blow Off Valve Louder

Free-Flowing Air Filter

Adding a free-flowing air filter is one simple and effective way to make your BOV louder. A free-flowing air filter allows more air into the engine, which leads to a sharper and more pronounced BOV sound. You can find many high-quality filters on the market that will fit most BOVs.
Replace your existing filter with this new one, and you’ll notice a significant difference in sound.

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Flexible Tubing

If you’re looking for ways to make your blow-off valve louder, one solution is to add more flexible tubing. Flexible tubing is a cost-effective way to amplify the sound of your blow-off valve without spending hundreds or even thousands of dollars on new equipment. Adding more flexible tubing can increase the length between the turbocharger and the blow-off valve, resulting in a louder sound when air is released. 

This method works particularly well with aftermarket intake systems with larger diameter piping than stock systems. Keep in mind that the types of music and sound profiles vary. 
You can also substitute the ride with the caulk and seal, which helps transmit the sound. It’s readily available at a hardware shop.

Dual-Clamp Blow-off Valve

A dual-clamp blow-off valve is popular for many car enthusiasts who want an aggressive and attention-grabbing sound. This type of valve provides better sealing and more precise control over air pressure release, resulting in a louder and crisper sound. To get started, purchase a dual-clamp blow-off valve compatible with your vehicle’s make and model.

Once installed, you can adjust the spring tension to increase or decrease the pressure required to release air from the valve. Turning up the spring tension can create a louder discharge sound but be careful not to go too far, as it may affect how well it prevents your turbo from stalling.

How to Make a Blow Off Valve Louder

Blow-off valve-Fill a Bucket with Water

The popular modifications are making your blow-off valve louder. In this way, to make your BOV louder is by filling a bucket with water and attaching it to the end of your exhaust pipe. This technique works by creating resistance and backpressure within the exhaust system, which amplifies the sound of the BOV.
Simply attach one end of a hose to your BOV and put the other end inside the bucket of water.

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Replacing The Piping

The way to achieve this is by replacing the piping that connects the blow-off valve to the turbo. This simple modification can give your car a new sound and improve performance. You’ll need to locate the pipe that connects your car’s blow-off valve to its turbocharger. Once you’ve found it, carefully remove it and measure its length and diameter.

Then, purchase a replacement pipe that matches these dimensions but has a larger diameter than the original pipe. It will allow more air to flow through the system, resulting in a louder sound when the blow-off valve releases pressure.
After installing the new pipe, test out your car’s blow-off valve to hear how much louder it sounds now.

Replacing the Actual Valve

A method is replacing the actual valve with a more oversized one. It will allow more air to escape and make a louder sound. Searching online or visiting a local auto parts store can find an oversized valve. You’ll want to look for one that fits your specific make and model of vehicle, as well as any modifications you may have made.
Once you’ve found a suitable replacement, swap out the old valve for the new one.


Another way to increase the volume of your blow-off valve is by adding a resonator or muffler delete kit. These kits remove some of the restrictions in your exhaust system and allow more sound to escape through the blow-off valve.

Add a Sound Chamber

Adding a sound chamber that will amplify the flow of air through your blow-off valve can achieve a louder and more satisfying sound.
Identify the type of blow-off valve installed in your car. 

Recirculating and atmospheric: There are two types- recirculating and atmospheric. The former recirculates into the intake system, whereas the latter is released into the atmosphere. The sound produced by an atmospheric valve is significantly louder than its counterpart because it has no muffling effect. To modify this, purchase a sound chamber kit online or at an auto parts store near you. Before installing it, disconnect your battery to prevent any electrical damage while working with wiring harnesses. 

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A sound chamber amplifies the sound of the released air, creating that signature “whoosh” noise associated with blow-off valves. To add a sound chamber, you must purchase or create one that fits your existing blow-off valve system. Some aftermarket companies offer pre-made sound chambers for specific vehicle models, while others require some DIY skills to construct.

Once the sound chamber is ready, attach it to your blow-off valve. Making your blow-off valve louder may not be legal in all areas and could potentially lead to fines or penalties if caught.

In Closing

Here are a few best tips on how to make a blow off valve louder: Which we have discussed step by step in the upper paragraph. Get a higher-quality valve. The cheaper ones will produce less noise. Test the valve before each use to ensure it is operating properly. Clean and lubricate the valve regularly. It will keep it running smoothly and increase its lifespan.
Beware! Loudening your blow-off valve may not be legal in all areas and could incur a fine or penalty notice if discovered.


Do You Need a Turbo for A Blow-Off Valve?

Turbocharging is unnecessary for a blow-off valve, though it can improve performance. A turbocharger works by forcing more air into the engine, which makes the engine run faster and produce more power. The ablow-off valve does not require as much power as other engine components, so a turbocharger would not be necessary.

Can You Adjust a Blow-Off Valve?

Yes, you can adjust a blow-off valve. It is important to know the correct way to do so to maintain the valve’s functionality. Turn the valve handle counterclockwise until it stops. Then, turn the handle clockwise until it reaches the desired position.

How can I make my blow-off valve louder without increasing the fire risk?

A few ways to make your blow-off valve louder without increasing the fire risk. 
Increase the flow rate of the valve. 
To use a more powerful valve. 
And you can install a louder valve in an area less likely to be used.