Turbosmart Supersonic BOV Black WRX (2002-2007) STI (2004-2018) Audi The BBS CH-RII is a

The BBS CH-RII is a two piece wheel with a cast aluminum center featuring a sport inspired split spoke design

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Turbosmart Supersonic BOV Black WRX (2002-2007) STI (2004-2018) Audi The BBS CH-RII is aTurbosmarts loudest blow off valve, the Supersonic for the Subaru WRX STI 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 for your Subaru STI. FITMENT: Subaru STI 2004 2018 Subaru WRX 2002 2007