i have an 04 f150 (new body style) super cab with the 4.6L V8...i am looking into getting a 40 series flowmaster, but not sure which one to get (original 40, super 40, or 40 series classic). i am looking for an aggressive sound that isnt too loud from inside the cab, and i'm not sure whether or not to dump it or just run the tailpipe to the back. any suggestions???

 

Sounds like you would like the 50 series over the 40 series for what your wanting.