A full atmospheric BOV for racers and serious enthusiasts who want to be noticed. Supersonic provides a superior flow performance with the famous "supersonic" sound. Featuring a tool-free adjustment via a rotating cap and a positive-seal piston this is Turbosmart loudest BOV.

SUPPLIED WITH:

• Yellow Spring Rated -22 to -20 InHg (installed)
• Gasket
• Hose blanking plug

FITS:

• Subaru Forester XT 2006-2007
• Subaru WRX 2001-2005
• Subaru WRX 2006-2007
• Subaru WRX STI 2001-2003
• Subaru WRX STI 2004+