23 AUTOMOBILE PARTS AND ACCESSORIES-NAMELY, ENGINE ASSEMBLIES, CYLINDER HEADS, CYLINDER BARRELS, VALVE COVERS, HEADERS AND EXHAUST SYSTEMS, INDUCTION SYSTEMS COMPRISED OF CARBURETORS, MANIFOLDS, INJECTOR ASSEMBLIES AND LINKAGES FOR CARBURETORS, ENGINE ADAPTER PLATES, CLUTCH ASSEMBLIES, FUEL PUMPS AND OIL PUMPS, AND GEAR SHIFT CONVERSION KITS FOR MODIFYING SHIFTING PATTERN FOR AUTOMOBILES