Turbosmart Blue Supersonic Blow Off Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 discontinued-with-inventory you need to upgrade any

you need to upgrade any factory bushing you can

Freeing up airflow into the turbocharger is key to making power

Stainless Steel Layers

50 thread pitch

Turbosmart Blue Supersonic Blow Off Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 discontinued-with-inventory you need to upgrade anyPart #: TS 0205 1315 Turbosmarts loudest blow off valve, the Supersonic is sure to turn heads wherever you are. This valve is ideal for both street and race cars and produces the signature Supersonic sound. It is fully atmospheric and features a "tool free" adjustment setup by turning the cap of the valve. Included is an aluminum weld on flange and quick release v band clamp.