Custom Loudmouth?
In theory you should be able to do this, but the pipe on the passengers side is not straight so you will likely need an exhaust shop to fab up a bend with the muffler else the tips won't be in the correct place. Maybe some 10 series Flowmasters would work as you can get them as short muffers (6" I think).
Kinda curious if you didn't want loud why have a Loudmouth?





