Turbosmart designed their blow off valve to be the all in one solution for STI owners. It's dual port is configurable so you can vent to atmosphere, recirculate the air, or do a little of both. This ensures you'll get the sound you want and maintain the factory driveability.

Turbosmart designed their blow off valve to be the all in one solution for STI owners. It's dual port is configurable so you can vent to atmosphere, recirculate the air, or do a little of both. This ensures you'll get the sound you want and maintain the factory driveability.

Turbosmart Port Fitting Tutorial

Fits:

2015 Subaru STI Turbosmart Dual Port Blow Off Valve