Turbocharger Blow-Off & Diverter Valves
- TurboXS®Blow-Off Valve (BOV-SML)Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$179.10
- TurboXS®Hybrid Blow-Off Valve (WS-HYB)Hybrid Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$224.10
- TurboXS®Hybrid Blow-Off Valve (HC15T-HYB-GRY)Hybrid Blow-Off Valve (HC15T-HYB-GRY) by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$219.23
- TurboXS®Hybrid Blow-Off Valve (MS3-HYB)Hybrid Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$215.10
- TurboXS®Hybrid Blow-Off Valve (HC15T-HYB-BLK)Hybrid Blow-Off Valve (HC15T-HYB-BLK) by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$219.23
- TurboXS®Hybrid Blow-Off Valve (HC15T-HYB-RED)Hybrid Blow-Off Valve (HC15T-HYB-RED) by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$219.23
- TurboXS®Hybrid Blow-Off Valve (HC15T-HYB-BLU)Hybrid Blow-Off Valve (HC15T-HYB-BLU) by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$219.23
- TurboXS®RFL Blow-Off Valve (WS02-XS-RFL)RFL Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$250.29
- TurboXS®Type H-RFL Blow-Off Valve (WRX08-RFL)Type H-RFL Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$224.10
- TurboXS®Type H34 Racing Bypass Valve (WRX08-RBV)Type H34 Racing Bypass Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$224.10
- TurboXS®Type XS Recirculating Bypass Valve (W15-XS-RBV)Type XS Recirculating Bypass Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Designed to deliver trouble-free, consistent performanceRight for your vehicle and racing lifestyle$224.10
- TurboXS®Type-XS Blow-Off Valve (W15-XS-HYB)Type-XS Blow-Off Valve by TurboXS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$224.10
- Kayser®Turbocharger Bypass Valve (3.023.978-00)Turbocharger Bypass Valve (3.023.978-00) by Kayser®. Do you hear chirping or squealing noise? Has the "power" disappeared from your steering? Does your engine crank slowly and are your lights dim? You may need accessory drive belt...High-grade design and construction built to last for yearsPerfect for use in high-speed environments$62.72
- Kayser®Turbocharger Cut-Off Valve (034145710B)Turbocharger Cut-Off Valve (034145710B) by Kayser®. Do you hear chirping or squealing noise? Has the "power" disappeared from your steering? Does your engine crank slowly and are your lights dim? You may need accessory drive belt...High-grade design and construction built to last for yearsPerfect for use in high-speed environments$92.63
- PERRIN Performance®Recirculating Blow-Off Valve (PSP-TAC-615RD)Recirculating Blow-Off Valve (PSP-TAC-615RD) by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized...Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response$225.25
- PERRIN Performance®Recirculating Blow-Off Valve (PSP-TAC-610RD)Recirculating Blow-Off Valve (PSP-TAC-610RD) by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized...Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response$225.25
- PERRIN Performance®Recirculating Blow-Off Valve (PSP-TAC-610BK)Recirculating Blow-Off Valve (PSP-TAC-610BK) by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized...Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response$225.25
- PERRIN Performance®Recirculating Blow-Off Valve (PSP-TAC-600RD)Recirculating Blow-Off Valve by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized perfectly to...Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response$225.25
- PERRIN Performance®Recirculating Blow-Off Valve (PSP-TAC-600BK)Recirculating Blow-Off Valve (PSP-TAC-600BK) by PERRIN Performance®. Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick. With large 1.225" inlets and outlets, the PERRIN Blow Off Valve is sized...Sized to relieve any amount of boost pressureMaintains air within the boost system without reducing turbo response$225.25
- Professional Parts Sweden®Turbocharger Cut-Off Valve (21341157)Turbocharger Cut-Off Valve by Professional Parts Sweden®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...Made with precision and quality in mindDesigned to meet your specific needs$20.86
- Vemo®Charger Diverter Valve (V20-77-0023)Charger Diverter Valve (V20-77-0023) by Vemo®. Grade: OEM - Made in Germany (Q+). Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$155.89
- Vemo®Charger Diverter Valve (V20-77-0025)Charger Diverter Valve by Vemo®. Grade: OE. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$115.13
- Vemo®Charger Diverter Valve (V20-77-0024)Charger Diverter Valve (V20-77-0024) by Vemo®. Grade: OEM - Made in Germany (Q+). Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$257.22
- Vemo®Charger Diverter Valve (V10-77-1010)Charger Diverter Valve (V10-77-1010) by Vemo®. Grade: OEM - Made in Germany (Q+). Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$129.48
- Torque Solution®Blow-Off Valve Sound Plate (TS-FRD-367)Blow-Off Valve Sound Plate by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification that is...Great sound6061 Billet Aluminum$63.30
- Torque Solution®Blow-Off Valve Sound Plate (TS-SP2-KFR)Blow-Off Valve Sound Plate (TS-SP2-KFR) by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification...Great sound6061 Billet Aluminum$84.41
- Torque Solution®Blow-Off Valve Sound Plate (TS-SP2-KFBU)Blow-Off Valve Sound Plate (TS-SP2-KFBU) by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification...Great sound6061 Billet Aluminum$84.41
- Torque Solution®Blow-Off Valve Sound Plate (TS-SP2-KFBK)Blow-Off Valve Sound Plate (TS-SP2-KFBK) by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification...Great sound6061 Billet Aluminum$84.41
- Torque Solution®Blow-Off Valve Sound Plate (TS-SP2-HVR)Blow-Off Valve Sound Plate (TS-SP2-HVR) by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification...Great sound6061 Billet Aluminum$84.41
- Torque Solution®Blow-Off Valve Sound Plate (TS-SP2-HVBU)Blow-Off Valve Sound Plate (TS-SP2-HVBU) by Torque Solution®. The Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound your looking for on your turbocharged VW. A simple bolt on modification...Great sound6061 Billet Aluminum$84.41
Blow-off and diverter valves have always been popular upgrades for a turbo engine. However, not all car enthusiasts know why they are so important, and what the difference between a blow-off and diverter (also called bypass or recirculating) valve is. So let’s make things clear. Your turbocharger compresses air and forces it to the engine. This allows more air to enter the cylinders, which results in stronger combustion and increased horsepower. The high-pressure compressed air enters the engine when the throttle plate is open. However, when the throttle plate closes, this air has to be released; otherwise, the pressure in turbo piping will increase dramatically causing the air to move in the opposite direction. This can compromise vehicle performance and damage your turbocharger, engine and other vital vehicle parts.
Blow-off and diverter valves prevent this from happening by letting the air escape from the tubing. Once the throttle closes, the manifold pressure instantly drops below the atmospheric pressure. The valves sense this change and open to release the air. Blow-off and diverter valves do the same job but differ in the way they do it. Diverter valves recirculate the air back into the intake while blow-off valves vent it to the atmosphere. Since diverter (bypass) valves are better at keeping the pressure consistent, they come standard on most modern turbocharged vehicles. Blow-off valves create an attention-grabbing chuffing sound and are typically an aftermarket modification. On our website, you’ll find an extensive variety of both blow-off and bypass valves that are made using high-strength materials to offer uncompromising performance and reliability.
When choosing between a blow-off or a diverter valve, don’t forget to consider several important factors. First of all, remember that it’s not recommended to install a blow-off valve if you have a factory ECU and (MAF) sensor. The sensor calculates the amount of air that enters the engine and sends these data to the ECU so the ECU can determine the amount of fuel needed for a balanced air-fuel mixture. The blow-off valve vents the air after it has been calculated by the MAF sensor. But the control unit injects excess fuel taking into account the readings from the MAF sensor. This will eventually result in a rich mixture. To get a louder sound without compromising performance, choose a dual port blow-off valve that releases half of the air to the atmosphere while recirculating the other half back to the air intake. However, if you use an aftermarket ECU, you can upgrade to whatever valve you want.
Factory diverter (bypass) valves cope with the pressure pretty well, so there’s no obvious reason to upgrade them when you have a factory or low-tuned setup. However, they tend to leak under boost levels that are much higher than factory ones (usually 25 psi or more). In this case, you can opt for a high-flow bypass valve that can flow a larger amount of air without any airflow issues. But if you start making mods that are beyond the capabilities of the diverter valve, for instance running an 800-horsepower engine, blow-off valves are the only solution. So as you can see, your choice will depend on your performance goals and the type of setup you’re running.