Well, didn't need to make a video. It's just the turbo spool sound that I never was able to hear before. I had a guy down the street go for a ride with me, and he confirmed my suspicions. He used to drive a GTI for a few years, and is no stranger to turbocharged cars.
I'm not unhappy with the Mountune, as the MBRP was a true love/hate relationship. In the world of aftermarket exhaust, the Mountune is quiet, but you do know it's there (yes, it is louder than stock, just not a whole lot). I can say that I wouldn't mind just a little more sound, but I have yet to put on my downpipe. Hopefully, that will give me a little bit more uummphh! In the end, I don't regret it, but if I had to do it over... I would have bought the FSWerks stealth system. I purchased the Mountune last December and it had been sitting in it's box until this week. It is kind of cool to hear the spool!