This Forge open circuit alloy dump valve is compatible with Subaru Impreza from 2001 including the GR Sti from 2009. Made of aluminum and hand polished in the UK, this dump valve vents compressed air to atmosphere creating the famous "Pschhht" sound typical of rally cars when the throttle is relieved. This allows for quicker throttle response, and a higher load to retain turbo pressure more safely.

In the box:

• 1 x FMDVSUB01 Valve
• 1 x 34mm blanking plug
• 1 x Forge sticker

Fits on Subaru Impreza WRX from 2001 to 2007 and STI from 2008.