Best Blow Off Valves 2019 – Top 10 Ultimate Reviews & Buying Guide

Turbo engines build up extra pressure that needs to be released safely. Blow-off valves fulfill this purpose. While there are many decent OEM blow off valves, you can find others that improve on OEM technology.

However, there are also many rip-offs out in the market that does nothing for your vehicle whatsoever.

How can you tell which low off valves will help your turbocharged engine and which ones are fakes?

We have listed below the top 10 best blow off valves, along with their pros and cons. At the end, we have a buying guide to help you find the best blow off valves for your needs.

Let’s look at the list.

blow off valves

Top 10 Best Blow Off Valves For The Money 2019 Reviews


1 Turbosmart Kompact TS-0203-1209 – Mazdaspeed Model

Turbosmart has three models on the best blow off valves in this top 10 list. This is the least expensive of the three. So, if you are looking for a lower end model, this might be the blow off valve for you.

Customers appreciate the all-metal build (and the price of course). However, if you are looking to go beyond Stage 2 in your turbocharged engine, you will need something more potent than this. It ends up being about half as loud as standard BOVs, not because of lesser quality, but because of the unique air recirculation design it holds. Therefore, if you are looking for a quieter BOV, this is an excellent place to start.

There is one final concern that customers have with this model. It is not adjustable. It either fits and works standard, or it will not fit and will not work for you.

Turbosmart Kompact TS-0203-1209 - Mazdaspeed Model
Our rating:5 out of 5 stars (5 / 5)

Pros
  • Least expensive Turbosmart BOV
  • All metal build
Cons
  • Not adjustable
  • Half as loud as standard BOVs
  • Will not get you above Stage 2
Next is the BMW, Fiat, and Dodge Dart model. 

2 Go Fast Bits DV+ T9356 – BMW, Dodge Dart, and Fiat Model

This blow off valve from the company Go Fast Bits (GFB) is one of the best blow off valves for the Dodge Dart, BMW (F30 335i F20 F21 M135i), and Fiat 500 Abarth models.

If you are looking for extra horsepower from this BOV, you are probably going to be disappointed. It is definitely an improvement over the OEM valve. However, its primary task is improving the smoothness of the acceleration. With this valve, your gear shifting should not cause as much noise or bursts of pressure releasing in backfires or jerky shifting.

Go Fast Bits DV+ T9356 - BMW, Dodge Dart, and Fiat Model
Our rating:4.5 out of 5 stars (4.5 / 5)

Pros
  • An improvement over the stock valve
  • Smooths out acceleration
Cons
  • No improvement in horsepower
Do you have anything for a Subaru?

3 Go Fast Bits T9001 – Subaru Blow Off Valve

The second Go Fast Bits model on the Best Blow Off Valves list is the T9001. This is the model made specifically for Subaru Foresters, Imprezas, and Legacies.

This blow off valve installs into your Subaru easily and has great sound. With the right tools, you can be up and running in about 30 minutes. It will keep you on boost even at higher rpms.

It is loud and has the great whoosh sound blow off valves are famous for. The spring in it is sometimes rather stiff, causing problems fitting well in some of the WRX models. Additionally, it can cause backfiring, no matter how careful you are driving.

Go Fast Bits T9001 - Subaru Blow Off Valve
Our rating:4.7 out of 5 stars (4.7 / 5)

Pros
  • Easy installation
  • Great sound
  • Helps you stay on boost at higher rpms
Cons
  • Causes Backfiring
  • The spring can be rather stiff
Are there any universal models? Yes, there are.

4 HKS Super SQV4 Sequential Blow Off Valve Kit – The Universal BOV

The HKS is one of the best blow off valves because it is not specific to any one particular vehicle. It is designed to be a universal BOV.

It does not surge. This BOV will keep your boost running smoothly, in most cases, but it struggles to hold them steady. However, it has a significant, authentic blow off valve sound.

Also, the secondary valve flutters in use. Some customers have issues with this, but it is a standard feature of HKS blow off valves.

HKS Super SQV4 Sequential Blow Off Valve Kit - The Universal BOV
Our rating:4 out of 5 stars (4 / 5)

Pros
  • Does not surge
  • Authentic BOV sound
Cons
  • Secondary valve seal flutters
  • Problems holding boost
  • More expensive than other models
How about a Ford Focus?

5 Boomba Racing VTA BOV – Ford Focus ST 2013-2018 Blow Off Valve

The Boomba Racing VTA BOV is one of the best blow off valves for the Ford Focus ST. It is a high-performance blow off valve, constructed with incredible precision from aircraft grade billet aluminum. Additionally, it has a special brass piston unit that will withstand up to 70psi.

All blow off valves are loud, but the Boomba Racing VTA is exceedingly loud, even annoyingly loud at times. If you are looking for a loud BOV for your Ford Focus, this may be the blow off valve for you.

Boomba Racing VTA BOV - Ford Focus ST 2013-2018 Blow Off Valve
Our rating:4.6 out of 5 stars (4.6 / 5)

Pros
  • Precision manufactured out of aircraft grade billet aluminum.
  • Tested to withstand up to 70psi
Cons
  • Exceedingly loud
I’ve got a VW. Do you have a BOV for it?

6 Go Fast Bits T9351 – Best VW and Audi BOV

This BOV is one of the best blow off valves for VW an Audi Models, including the 2006-20014 Golf and the 2006-2013 Audi A3.

This is an excellent BOV that is the only valve on the market to solve the problem of holding boost without causing flutter. It is a diaphragm design that is not adjustable, so make sure it is going to fit your turbo engine before purchasing and installing it.

This is a top-quality BOV with beautiful sound. One downside to these great products is that they are often imitated by knockoff companies. Be careful about who you order it from and make sure it is the genuine GFB T9351.

Go Fast Bits T9351 - Best VW and Audi BOV
Our rating:4.5 out of 5 stars (4.5 / 5)

Pros
  • Better than OEM product
  • Smoother acceleration
  • Often imitated
Cons
  • More sound improvement than performance

7 GReddy (11501665) Blow-Off Valve – The Other Universal BOV

GReddy has created a wonderful BOV that makes our list of Best Blow Off Valves because of its universal application. This BOV is not a cheap part, which may be the only downside to it.

It has a floating valve setup and is built from high-quality billet aluminum. This BOV gives you excellent control over your boost and smooths out those transitions between accelerating and braking. Additionally, it requires GReddy piping and flange so you may need to purchase a few extra parts to install it. Once you have them though, it is easy to install.

This BOV, again due to popularity, has been known to have copycat fakes on the market. Be sure you have a trusted seller to make sure you get the real deal. Beware of cheap offers.

GReddy (11501665) Blow-Off Valve - The Other Universal BOV
Our rating:4.1 out of 5 stars (4.1 / 5)

Pros
  • Amazing air-swoosh sound
Cons
  • Beware of fakes

8 Turbosmart TS-0203-1061 – BOV for Ford Focus ST 2013+

Here is Turbosmart’s competition with the Boomba Racing VTA BOV. This BOV is designed specifically for the BorgWarner EFR and KKK turbochargers. It is one of the best blow off valves to replace the standard OEM BOV.

This blow off valve is easy to install, and the reviewers say that it, like the Boomba, is always loud. If you like loud sounds, you will be pleased with this BOV.

However, the reviews say that customers have noticed reduced fuel mileage if it is used often. Some of that probably comes with the territory of BOVs in general, but it doesn’t help their case either.

Turbosmart TS-0203-1061 - BOV for Ford Focus ST 2013+
Our rating:4.7 out of 5 stars (4.7 / 5)

Pros
  • Excellent OEM replacement
  • Easy to install
Cons
  • It is always loud
  • Reduced fuel mileage when used often
What is the best BOV on the list?

9 Turbosmart TS-0203-1022 – Dual Design for Universal Fit

Turbosmart’s last BOV on the Best Blow Off Valves list is a dual port, piston design. It is versatile and universal in application, unlike the previous two Turbosmart BOVs.

What does this dual design do? It allows your vehicle to run quietly when not engaged and with a full vent sound when you hit the accelerator. Basically, this BOV gives you the best of both worlds, all at once.

Additionally, this is one of the less expensive universal models, giving the reviewers very little to be critical about.

Turbosmart TS-0203-1022 - Dual Design for Universal Fit
Our rating:5 out of 5 stars (5 / 5)

Pros
  • More versatility, higher performance
  • OEM type fitment
  • Offers superior flow
  • Offers greater structural integrity under boost
  • Fits most cars using the factory Bosch or Denso bypass valves and Subaru Legacy/Liberty 09-10
Cons
  • None

10 GReddy (11501661) Blow-Off Valve Stiff Spring – MIA

Here is the last of our best blow off valves. Like the other GReddy BOV, this is a universal fit. This model is set apart by having a stiffer spring to work with.

However, it is incredibly hard to find, and there are few reviews out to give more specific details. Chances are, you will have trouble locating one of these, especially new. If you are approached by an online seller with one of these, make sure it is a legitimate GReddy BOV and not a cheap imitation.

GReddy (11501661) Blow-Off Valve Stiff Spring - MIA
Our rating:4.2 out of 5 stars (4.2 / 5)

Pros
  • Stiffer Spring
Cons
  • Limited Availability

Best Blow Off Valves Buyer’s Guide

Before purchasing a BOV, make sure it will fit your vehicle model and turbo attachments.

Pressure Release

The first purpose of a BOV is to release the pressure of the turbo engines. Which of these best blow off valves do that well? All of them perform that task, but not all in the same way.

You may notice that there are essentially five companies represented in this top ten best blow off valves list. The Boomba and HKS only have one BOV listed here. HKS has a standard issue with their secondary valve which flutters when used. The Boomba is just loud.

best blow off valves reviews

Turbosmart, GReddy, and Go Fast Bits all have more top of the line models of BOVs on our list. The Turbosmart 0203-1022, a universal model, was one of the best at creatively handling that pressure with its unique dual-design. Unlike some of the others that struggled to maintain boost, the universal model Turbosmart managed to run quietly when idling and fully vent under acceleration.

Frequency of Imitation

One additional means of measuring value in vehicle parts, and many other products, is to study the frequency of imitation. As the saying goes, imitation is one of the best forms of flattery. It is not always appreciated though.

In these cases, the imitations are often much poorer quality than the real BOVs. The originals, which are usually made of high-quality billet aluminum of aircraft grade, will work wonders on your vehicles, while the fakes could potentially be harmful. They may not work at all.

There are two blow off valves on the list above which reviews specifically warned to be careful of fakes on the market: the Go Fast Bits T9351 (for Audis and VWs) and the GReddy Universal BOV. These two BOVs, in particular, are popular and have stayed popular long enough for competitors to try to reverse engineer them and rebuild cheap versions. You can expect these products to lead the market.

best blow off valves

Models Available

One of the most critical factors you need to consider is whether or not these best blow off valves will work for your car. Here is a short list that explains which BOVs go with which car models.

  • Audi A3 – Go Fast Bits T9351 or Go Fast Bits T9351 (6)
  • BMW – Go Fast Bits DV+ T9356 (2)
  • Dodge Dart – Go Fast Bits DV+ T9356 (2)
  • Fiat 500 Abarth – Go Fast Bits DV+ T9356 (2)
  • Ford Focus ST – Boomba Racing VTA (5) or Turbosmart TS-0203-1061 (8)
  • Mazdaspeed – Turbosmart TS-0203-1209 (1)
  • Subaru – Go Fast Bits T9001 (3)
  • VW Golf – Go Fast Bits T9351 or Go Fast Bits T9351 (6)

All others – HKS Super SQV4 (4) GReddy (11501665) (7), or Turbosmart TS-0203-1022 (9)

Conclusion

As you can see, for European model cars, you will do well with one of the Go Fast Bits best blow off valves, according to the reviews. GReddy and HK both have some excellent universal blow off valves, and HK is a reasonably popular brand. If you are new to turbo engines and not looking to get above Stage 2, the Turbosmart (#1) is a less expensive way to go.

However, if you are looking for the best of the best, it is worth your time to look into the Turbosmart TS-0203-1022 Dual design. This model may have most of the others beat in sheer versatility and performance.

Best Blow Off Valves 2019 – Top 10 Ultimate Reviews & Buying Guide
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