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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 [...]

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 [...]

GReddy Blow Off Valves are easily adjustable to prevent both premature boost leakage and compressor surge. Each is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the two different sizes give the GReddy user the [...]

GReddy Blow Off Valves are easily adjustable to prevent both premature boost leakage and compressor surge. Each is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the two different sizes give the GReddy user the [...]

GReddy Blow Off Valves are easily adjustable to prevent both premature boost leakage and compressor surge. Each is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the two different sizes give the GReddy user the [...]

GReddy Blow Off Valves are easily adjustable to prevent both premature boost leakage and compressor surge. Each is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the two different sizes give the GReddy user the [...]