[ferociousfish]

I'm guessing that the right-hand side would be a true side pipe exiting behind the door, whereas the left-hand side (not legally able to be directed toward a sidewalk) would typically be a cosmetic pipe, with the exhaust exiting out the back. Is this correct?

Venom, it might be an idea to drop the 'Capitalise Every Word' typing...very hard to read and detracts from the seriousness of your posts, but just my 2 cents worth
Cheers Dave