automotive parts for land vehicles, namely engine retarders and exhaust brakes; replacement parts for engine retarders and exhaust brakes, namely exhaust sleeves, clamps, brackets, screws, nuts, bolts, washers, quick disconnect tabs, protection valves, air brake tubes, air brake hoses, hose fittings, air reservoirs, air compressors, compression fittings, drain valves, pressure release valves, check valves, bushings, couplings and pneumatic fittings