The exhaust sound and emission control systems comprise a series of
embodiments of devices for reducing sound and noxious emissions from an
automotive exhaust. The system may have an exhaust resonator having one
or more catalytic converter elements in combination therewith in a single
device. Alternatively, the system may have multiple angularly disposed
chambers therein, with a series of swept baffles or guides in one of the
chambers, thereby combining resonator and muffler functions in a single
device. In another alternative, the system has a series of longitudinal
tubes therein in combination with a series of V-shaped guides or vanes,
combining catalytic converter, muffler, and resonator functions in a
single device. The various elements of the different embodiments, e.g.
catalytic converter element(s), double wall shell, perforated tubes and
multiple flow paths, interconnecting crossover tubes, etc., may be
combined with one another as practicable.