Bypass Valve for 2004-2021 STI, WRX, Forester XT Color:Black

Bypass Valve for 2004-2021 STI, WRX, Forester XT Color:BlackAdjustable relief pressure and flow control make fine tuning on the fly simple and quick with the PERRIN BOV BPV.

slow responding

Crafted from precision-welded boxed steel

lightweight replacement for the older aluminum version

Engineered exclusively for the PERRIN FMIC Core

Add a consistent 5+ wheel horsepower with one of the largest Top Mounted Intercoolers on the market

PERRIN Wheel Spacers move your wheels and tires outwards so they are more flush with the fender for the perfect stance

The COBB AccessPORT is the easiest ECU upgrade for your Subaru

Improve throttle response and shifter feel by replacing the soft rubber bushings with durable urethane ones

CNC machined from durable aluminum

maintaining proper tension and load capacity over their lifespan

This simple upgrade removes the OEM delay valve to improve clutch engagement feel in both normal and aggressive driving

causing unpredictable handling