2015+ STi: Cardboard Air Box Test vs No Air Box

2015+ STi: Cardboard Air Box Test vs No Air Box

We had a customer come in today, that was not sure if the Cobb Air Box for the Cobb SF Intake made much of a difference, versus not having one at all. So we got to tuning the vehicle and started noticing we were down on power by quite a bit from our initial pulls, so we began investigating.