The BOV leads to a loss in horsepower and slower response from your turbo. For 15-20 Subaru WRX 2.0L Turbo( DO NOT FIT STi ). 1x Blow Off Valve.
Red Adjustable Blow Off Valve Recirculation BOV For 02-07 Subaru WRX 04-17 STI
Adjustable Dual Port Blow Off Valve Bov for 02-07 Subaru WRX and 04-18 STI
Aluminum Adjustable Dual Port Blow Off Valve for 02-07 Subaru WRX and 04-18 STI
Chrome Aluminum 25 PSI Adjustable SSQV SQV Sequential Turbo BOV Blow Off Valve
50mm Billet Universal Turbo Blow Off Valve Kit Adjustable 6PSI+18PSI Springs
ISR Performance Blow Off Valve Block Off Plate for Hyundai Genesis Coupe 2.0T