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Made from billet aluminium, this atmospheric diverter valve dumps the charge-air to atmosphere creating the “Whoosh” sound most commonly associated with rally cars. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably.Dual-Piston Atmospheric Valves and Valve Fitting Kits
All Forge Motorsport Dual-Piston Atmospheric Valves have been designed and built [...]

Made from billet aluminium, this atmospheric diverter valve dumps the charge-air to atmosphere creating the “Whoosh” sound most commonly associated with rally cars when the throttle is lifted. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably.
Available in Polished only. Dual-Piston Atmospheric Valves and Valve Fitting Kits
All Forge [...]

Inefficient factory blow off valves (BOV) can hinder boost response during shifts and can damage your expensive turbo charger. PERRIN™ offers several choices for owners to choose the best solution to the problem.
Fully recirculated (Recirc see PSP-INT-600)
For clients that demand proper air fuel ratios and idle quality we offer a fully recirculated BOV. The internal [...]

It was only a matter of time before Agency Power would release their exclusive line of Blow Off Valves for the Subaru WRX and STI vehicles. From the time of its inception to the USA, the WRX and now STI have required one important piece… The blow off valve is a device that helps relieve [...]

What makes the Agency Power DSM 1G Blow Off Valve above all others? The AP BOV is made in the USA and designed from the bottom up after analyzing the current market competitors. What we designed was a full T6061 CNC aluminum valve. The sleek body has a smooth round surface anodized with rich stylish [...]

The Megan Racing blow-off valve is capable of over 24psi, so it’s perfect for your daily driver or your track-only race machine. Megan Racing blow-off valves are made of high quality chrome-plated aluminum and are very durable. Because of its universal fitment, some modification may be required for your vehicle and professional installation is [...]

For use on turbo-charged and super-charged applications (Paxton, Vortec, etc.). The body and all internal components are CNC-machined from 6061 aluminum alloy. It features a large 1.98 in (50.5mm) valve; we believe this is the largest valve available with the highest flow capacity.The V-Band design aluminum mounting clamp gives a very [...]

The Racing Bypass Valve Type 25 was specifically designed to replace the 1 inch (25mm) Bosch Bypass Valve used in most Volkswagen and Audi applications. The Bosch valve is prone to failure in stock application and not adequate for holding boost in “chipped” 1.8T equipped vehicles. The RBV-25 spring tension is adjustable, making it ideal [...]

Want a valve that people notice when it goes off but don’t want “RFL-loud”? The BOV Type H is the valve for you. Providing greater venting flow than our BOV-S, the BOV-H is designed for turbo charged engines running up to 35 psi. Crafted from hard anodized aluminum and brass, the valve is [...]

The TurboXS Blow Off Valve - Type S is designed to release compressor pressure surge caused by changing gears or backing off the throttle quickly. This valve is an extremely important part of any turbo system allowing quicker turbo spool up between gear changes and greatly increasing the life of a turbocharger. The BOV Type [...]