Perrin [15-21 WRX] Recirculation Blow Off Valve - Red Engine Function Display  Tuning Port USB on

 Tuning Port USB on board

Helps maintain cooler intake air temperatures

2oz) [w/ 23mm & 5mm spacer]

Damping Levels 16-Level Height Adjustment Yes Spring Rate(Front) 8 kg/mm (448 lbs/inch) Spring Rate(Rear) 6 kg/mm (336 lbs/inch) Spring Length(Front) 200 mm Spring Length(Rear) 160 mm Front Top Mount Yes

All flanges on each Invidia Gemini catback exhaust are CNC-machined for precision

Perrin [15-21 WRX] Recirculation Blow Off Valve - Red Engine Function Display  Tuning Port USB onAdd horsepower, quicker response, and reliability with the PERRIN BOV. A must have replacement for the leaky, slow responding, and plastic OEM blow off valve. During testing, it was determined that until approximately 3 psi of boost is reached, the OEM blow off valve does not seal. This leads to a loss in horsepower and slower response from your turbo. The PERRIN Blow Off Valve solves this problem with a proper seal as well as being fully adjustable.