no, but on 'verts they run above the floor x-brace.

here in the US the tailpipe exit style laws vary state to state, and so does enforcement. some may say where the pipe can exit, specifiying X" behind passenger compartment or X" behind rear axle. vans, pickups w/shell, schoolbuses and station wagons may be required by law to have the exhaust exit out the side rather than straight out... at least this is what i picked up bending pipe in LA, IL, MO, and NC. i think they are included in the emissions laws, but i just did what i was told. i never actually looked them up.