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Subaru WRX Blow Off Valve

The piping from the XS Engineering front-mount intercooler is home to an HKS Super Sequential blow-off valve, which relieves pressure in the intake tract between shifts.
Subaru WRX Sparco - QuickStrike

 The piping from the XS Engineering front-mount intercooler is home to an HKS Super Sequential blow-off valve, which relieves pressure in the intake tract between shifts.  View Related Article

 

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