I had my exhaust changed when the truck was about a month old. I, too, had a exhaust shop buddy do mine. After throwing around ideas (and price, lol) we decided to redo the Y-pipe in stock size, just less restrictive, into the factory 2 3/4 pipe, into an 18" Magnaflow, then 3" from there to the tip, which is in factory location--only chrome and bigger. I love the sound of it, only drone I get is around 1600-1900, and it's not unbearable. I know I could get rid of that drone if I cut off about a foot of my pipe, but I don't want to lose my tip, LOL.