Im running exstreem street and when I sopt the skinny peddle it reminds me of my dads blown 6.0 with open headers it's just to much for me. I had strit piped stock and when i flored it was loud but nothing to me compared to what it does now. Just my 2 cents. alot of folk on here seem to love it. I did to when it was stock. it not loud at all until i get on it, then all heck breaks loose and im gone. the tune is freaking awesom though. well worth the money.
to answer your questions... no gauges they'll be here soon. and I dont notice any drone what so ever, and the turbo whissle rocks its not to bad at all, if anything it's my favorite part. I'll try to post a vid soon.