My question is not "which muffler should I get" because I already know what I want. I want to keep it simple and modest without doing any cutting or mods. Cat-back flanged, single in/single out, exit behind passenger side rear tire, nothing crazy. The Flowmaster Force II P#17362 would be ideal except for one thing. When confirming fitment on the Flowmaster site, it says it is for extended cab, short box. It mentions nothing about Crew Cab and I dont want to get something that doesnt fit and will ultimately have to return. I cannot contact them because their support site sucks balls and am deployed so a telephone is useless. MY QUESTION IS....has anybody purchased a cat-back exhaust system from Flowmaster recently for their crew cab truck, and did you have to select "extended cab"?