7 Air filters, oil filters, petrol filters, gas-oil filters, spark plugs for vehicle engines, heater plugs for vehicle engines, belts for motors and engines for motor vehicles, drive belts for motor vehicle accessories, alternators for motor vehicles, starters for motor vehicles, joints for motors and engines, valve guides, exhaust pipes and silencers for motor vehicles, exhaust pipe fastenings for motor vehicles, catalytic exhaust-gas converters and catalyzers for motor vehicles; cylinder heads and joints for cylinder heads, connecting rods, drums, valves, fastenings for motor vehicle engines; compressors for motor vehicle air conditioning