Ok, I've been looking up tons of videos because of my anticipation of getting my own WRX. I found this and was wondering if it's realistic to get these results. I understand the guy has some extra work done to the car, but it seems like it's a before and after when he installed a Cobb Intake... The "after" makes it sound like he installed a BOV too. I absolutely love the sound and can't wait to put the Cobb SF Intake on it to hear that. But I guess I couldn't think of why you would get such a loud BOV sound with just installing an intake... Here's the video, the "after" part begins at 1:30.
2011 WRX Cobb SF Intake Before & After, Driveby - YouTube