Perrin Recirculating Bypass Valve

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With large 1.225" inlets and outlets, the PERRIN Bypass Valve is sized perfectly to relieve any amount of boost pressure without fear of compressor surge. Don’t be fooled by giant oversized bypass valves, these inlet and outlet sizes were chosen to ensure the perfect balance of flow and to maintain boost in your system, without ruining response by dumping too much boost. Compatible for:2002-2007 Subaru WRX 2004-2014 Subaru STI 2015-2017 Subaru STI Show more