so i have pretty much decided on the magnaflow 14. just have a couple questions. a buddy of mine has the 14 on his quad cab express and its fairly loud. sounds good tho. i have a regular cab express and wondering what the difference would be with my truck having less pipe than a quad cab. will it be louder??? also, as we all know stock muffler is 3in in 2.25 out, only 14in magnas i see and 3in 2.5 out. will that be ok???