Forge Dual Piston Ram Dump Valve K&N but due to its size

but due to its size we needed to make the fitting more adjustable

Complete kit

1L Capacity Up KIT

When a Black cooler is selected

Opel Astra VXR J type

Forge Dual Piston Ram Dump Valve K&N but due to its sizeSuitable for most turbo cars with an Air Flow Meter. Made from billet aluminium, this atmospheric diverter valve dumps the charge air to atmosphere creating the "Whoosh" sound when the throttle is lifted. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably. Unlike single piston or diaphragm diverter valves, this uses counter balanced springs and dual pistons to prevent the valve from leaking