Forge Motorsport polished alloy atmospheric ram dump valve and blanking plug for the New Age Impreza WRX and STi from 2001-2007.
Also suitable for the 2008 on Hatch STi model. This atmospheric diverter valve dumps the charge-air to atmosphere creating the "Whoosh" sound when the throttle is lifted. This results in both quicker throttle response and higher clamping load to maintain boost pressure more reliably.
Direct replacement for the original item that is bolted to the intercooler - very easy to fit.Part Ref: FMDVSUB01