Perrin Recirculating Blow Off Valve Red 2015-2021 WRX / 2014-2018 Forester XT YMM_2012_FRS but pairing with high-quality brake

but pairing with high-quality brake pads will maximize performance benefits

The tank can be polished

preventing heat damage that can affect performance

38lb compared to stock weights of 6

while the 60mm tips expand to 76mm piping

Perrin Recirculating Blow Off Valve Red 2015-2021 WRX / 2014-2018 Forester XT YMM_2012_FRS but pairing with high-quality brakePerrin Recirculating Blow Off Valve Red 2015 2021 WRX 2014 2018 Forester XT Adjustable Boost Control Performance Blow Off Valve Overview The Perrin Recirculating Blow Off Valve (BOV) is a precision engineered upgrade designed specifically for the 2015 2021 Subaru WRX and 2014 2018 Forester XT. It addresses a common limitation of the OEM blow off valve, which does not fully seal until around 3 psi of boost, resulting in lost horsepower and slower turbo