The Best Blow Off Valves (Reviews) in 2023 | Autance

The DV+ is a direct fit blow off valve that has an impressive build quality for its mid-end price. With minimal plastic parts, Go Fit Bits has boosted the valve’s mechanism by replacing the housing with an anodized billet aluminum shell and a brass piston that is engineered to exact tolerances. The result is a turbo blow off valve that is slick to fit and gives you a sharper throttle response and as much boost as you can pitch at it without any turbo flutter. Once in place, everything just feels smoother and your car performs as if it’s just had a professional tune up. The DV+ is a great value and good quality for its price tag.

This mid-priced turbo blow off valve totally nips those compressor surges in the bud, giving you performance and a power boost that will put a smile on your face.  And although this unit is larger than the usual blow off valve, the sound it produces is sublime as is the control it gives over the excess boost of your turbocharger. The installation features of the Super SQV4 are nifty too with C-clips, an O-ring, T fittings and a vacuum filter that make fitting as well as using this loud blow off valve a pleasure. The installation guide is also easy to use. In short, quality engineering from the HKS team has resulted in a high-performing blow off valve at a good price.

If loud and proud is your thing, then check out this solidly built blow off valve from Turbosmart.  There is something deeply satisfying in taking your foot off the throttle to release its distinctive whoosh, but this smart unit is more than just about turning heads.

The Turbosmart comes in at a mid-price point, and you get a lot of quality for your money. Its clever shape is designed to amplify sound as well as ensure long-lasting performance. Coming in at a manageable size, it is also pretty lightweight compared to others on the market, but this is in no way a lightweight blow off valve. It will improve the efficiency of your turbo engine nicely; the response underfoot is awesome, and it works well to prevent any compressor surge. Now that is something to shout out loud about.

Here’s a blow off valve that doesn’t really like to make a fuss. If you prefer a valve that gets on with its job then the Boomba for the Ford 2.0L EcoBoost OEM Turbo is certainly worth a look. It does make a sound – and a pretty loud one at that – but it is not quite on par with the more vocal blow off big boys. Its sound is a little lacking when it comes to that lovely whoosh that sets your turbo apart. But with its lack of ‘voice’ you do, however, get a good unit that is easy to install, and it can stand up to boost pressures of up to 70 pounds per square inch. Plus, it is made from aircraft-grade billet aluminum, so it promises a quality build that is both neat and durable.

Machined from CNC aluminum alloy and featuring a large 50mm valve, the Dewhel is our best value pick due to its price as well as its universal use.

You get a lot of nice engineering tech, including a banjo-type air fitting and bolt that is machined from aluminum and comes complete with an 10mm hose barb for a fast response. There is also a high-temp silicone Nomex-reinforced diaphragm for a longer shelf life. This really is an impressive turbo blow off valve and one that is durable and easy to fit. It comes complete with all the fittings. When put to the test, the sound is stunning and is certainly not budget priced.

As one of the ‘new generation’ blow off valves that come with a floating valve design, the efficiency of the Greddy is top notch. The floating valve has an updated adjustable dual-spring system. The upgraded design makes the spring preload setting less dependent on the idle, giving a much better response and more air flow. And there are also discharge ports that draw in air to amplify its growly blow off sound.

The overall design of the blow off valve housing is slimmer, making the Greddy smaller than many other turbo blow off valves currently on the market. But its boosted efficiency makes it a great value.  Complete with its own installation kit, the beauty of the small but perfectly formed Greddy is that you won’t need to move any engine parts when installing it, so getting this loud blow off valve up and running is a breeze.

A direct bolt-on replacement for the factory valve, this is an excellent fit for Mazdas. It gives an immediate pressure response when you ask for it. Small with a neat design and engineered from solid billet aluminum, the Turbosmart Kompact easily gives you the performance you need without the super loud noise. This is very much a blow off valve that likes the performance to speak for itself. The sound itself is sweet, yet not head turning loud, making the Turbosmart Kompact a blow off class act.

The valve comes complete with everything you need to install the unit, and fitting the valve is not too challenging. This is a quality blow off valve with a sweet sound you will be pumped to take out around town.

Sometimes simple is best, and when it comes to the Go Fast Bits DV Diverter the title pretty much fits. Easy to fit, easy to maintain, and a decently priced unit, we think the DV diverter is a great option. It fits seamlessly to the factory solenoid coil, and all the valves are metal, boosting its strength and durability. The whole housing is also machined out of billet aluminum. There is a pilot actuated system for a rapid response regardless of the boost level, and there is no compression surge. You will also notice the smooth transition when accelerating and less turbo lag. To top it off, you get a turbo blow off valve that is super neat and easy to install. It’s definitely worth the investment as this is one blow off valve that will be with you for some time.

This is a premium pick, but you get your money’s worth, especially if you want to create some awesome sounds. You also get a complete installation kit – including a 5mm wrench – so you can be sure of a smooth and hassle-free fit.

But for the price, how does it perform? It’s impressive. It is direct vent, so you need to get the dialing right, but when you do you will feel it. The smooth transmissions and quick response times give you an awesome ride with no turbo flutter or compressor surge. The valve also has fully adjustable settings, so you can fine tune the performance to where you want to be. Yes, it is pricey, but the build quality is superb and has certainly been designed to last. And its relatively compact size makes it easy to install. This is one of the best sounding loud blow off valves hitting the road, and you won’t be disappointed if you are happy to pay the premium price.

For a blow off valve that ticks all the key boxes without sending your credit card into melt down, we think the Turbosmart Kompact is a pretty good bet.  This is a full recirculating turbo blow off valve that gives you a decent amount of performance and sound without going too over the top. It is also a well-made unit at a reasonable price. You won’t get that’ hey, look at me’ total sound blast, but it will still deliver the whoosh you are looking for.

The dimensions of the Kompact live up to its name, but the smaller size makes it easier to install without much moving around in your engine. The build is solid too, despite its size, and you will certainly feel the difference in your engine’s performance. The turbo response is greatly improved as you shift gears, and it nicely eliminates all that unwanted compressor surge.