I installed an AFE Stage II with the Pro Dry and pre filter this week and WOW... I removed the silencer ring during installation and the turbo sings real LOUD. I wasn't sure if I wanted that much turbo noise at first, but took a couple of friends for a ride and they convinced me to leave as is. I have noticed a slight increase in MPG also, maybe just a fluke, but seems a little better. I like the fit and finish of the system. Any doctors in the house that can tell me when the mod bug will go away, my wallet is screaming for some kind of reprieve.