Turbosmart Black Supersonic Blow Off Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 vendor_Seibon By adding these billet CNC-machined

By adding these billet CNC-machined mount rings

Beyond the turbine wheel

- 32% throw reduction

making them easy to tune

Handcrafted using high-quality 3K 2x2 twill weave carbon fiber

Turbosmart Black Supersonic Blow Off Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 vendor_Seibon By adding these billet CNC-machinedPart #: TS 0205 1316 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.