IAG Blow Off Valve AdaptorIAG Performance Blow Off Valve Adapter For 2002 07 Subaru WRX & 2004 21 STI. The IAG BOV adapter allows you to use your existing OEM factory blow off valve with numerous aftermarket front mount intercooler kits. Measuring 1. 375 inch (both inlet and outlet) and featuring a 1 2 inch thick flange you can be assured of a complete seal. Includes new factory gasket.
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