Forge Motorsport Dual-Piston Atmospheric Valve
The Forge Motorsport Dual-Piston Atmospheric Valve is a high-quality performance upgrade for your vehicle. Made from billet aluminium, this valve is designed to vent 100% of the residual charge air remaining in your forced induction system to the atmosphere at throttle lift. This creates the iconic “Whoosh” sound commonly associated with rally cars, while also improving throttle response and maintaining boost pressure more reliably.
With a recommended servicing interval of every 3 years or 20,000 miles, whichever comes sooner, this valve is built to last. It comes with a yellow uprated spring and a 28mm blanking plug for easy installation. Additionally, a Forge sticker is included in the package.
Please note that while the Dual-Piston Atmospheric Valve is designed to be compatible with mass air-flow sensor equipped vehicles, it may not be suitable for all applications. It is important to ensure that your engine management system can compensate for the loss of metered air through a vent-to-atmosphere valve before installing this product.
At Progressive Parts, we offer fitting services for the Forge Motorsport Dual-Piston Atmospheric Valve at our performance workshop. If you have any questions about the compatibility of this product with your vehicle, please don’t hesitate to reach out to us.

