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I have just recently accuired 2007 Super Cab 6 1/2ft bed with the 5.4. I work at a ford dealership and bought the truck from them it was a trade. Whoever had it before me had a custom exhaust on the truck that caused some problems that the dealership had to fix. But they had cut off their exhaust and put a factory style one on with a goofy little muffler and 1 3/4" tailpipe. This is the quietest exhaust I have ever heard. I am not a sound fanatic but I like my vehicles to at least sound decent. I am wanting to do some experimenting with the exhaust on this truck to see if I like it. A buddy said on his old 02 with a 5.4 he had a Flomaster 40 delta flow turned down underneath the bed and it sounded good outside and wasn't super noticeable inside. I am wondering if anyone on here has done that with this body style truck so I can get an idea if its even worth my time trying. Thanks!
I have yet to hear one of our trucks with a quiet but clean exhaust. It's either you hear the fan or it's a loud exhaust.
As for mufflers I'd suggest the borla pro xs or magnaflo.
I'm big into racing and all my racing classes make you run a exhaust and muffler. The borla flows as good as any racing muffler and is one of the quietest on the market even for street exhaust. That's the one I run on my stock car. We are the quietest car in the field.
Magnaflo makes the best sounding mufflers I know of.
I'm not even close to a fan of flowmaster. They don't flow well at all. Lots of drone.