Topic summary
Tailpipe
Extracted from the Wikipedia article Exhaust system.
Tailpipe and exhaust
With trucks, sometimes the silencer is crossways under the front of the cab, and its tailpipe blows sideways to the offside (right side if driving on the left, left side if driving on the right). The side of a passenger car on which the exhaust exits beneath the rear bumper usually indicates the market for which the vehicle was designed, i.e., Japanese and British vehicles have exhausts on the right so they are furthest from the curb in countries which drive on the left, while European vehicles have exhausts on the left.