Engine exhaust systems comprised of pipes, collector, and muffler; Engine exhaust systems comprised of pipes, collector, and muffler for motor vehicles; Exhaust system parts, namely, headers as part of vehicle exhaust system; Catalytic converters for motors and engines for motor vehicles; Exhaust apparatus, namely, exhaust pipes for land vehicles; Automotive exhaust pipes; Motor vehicle exhaust system parts, namely, nitrogen oxide traps for exhaust systems being parts of internal combustion e...