Aftermarket automobile engine exhaust systems comprised of pipes, collectors, mufflers and particulate traps; Automotive parts, namely, engine seals; Back pressure valves as parts of machines; Catalytic converter units for vehicle exhausts; Cooling radiators for motors and engines; Exhaust manifold for engines; Hydraulic valve actuators; Intake and exhaust air flow vane assembly device for use in an internal combustion engine; Valves being parts of machines; Engine exhaust systems comprised o...