Air-intake tubes and filters for after-market installation of automotive engines; Automotive exhaust pipe; Automotive intake manifolds; Catalytic converters; Catalytic converter units for vehicle exhausts; Emission reduction units for motors and engines, namely, catalytic converters; Engine exhaust system comprised of a particulate trap; Engine exhaust systems comprised of pipes, collector and muffler; Engine exhaust tips; Exhaust gas treatment systems for diesel engines; Exhaust manifold for...