Hello Everyone, this is my first post as I just subscribed to TDR yesterday. I purchased my truck about a month ago, and while I was impressed with the power, I knew there was much I could do to unleash its full potential. So far I have put pyro and boost gauges along with the Edge Comp. I can't begin to explain the difference, those of you who own the Comp know what I'm talking about. A couple of days after I installed the box, I noticed that the "EasyMind" airfilter reader was at 65%, so I began shopping aroud for an AFE filter system. My next purchase will be an exhaust system, and I am looking for some insight on different products. From what I have seen, BD, Bully Dog, Banks, and Jannetty all offer 4" systems that claim about the same performance improvements, but what do you all think? Sound is an issue as well: I don't want to blow out any windows, but I do want a more authoritative sound than stock.