A Map Lamp is a small light in a vehicle the give a focused beam of light. These are different than the dome light and can be located in places like the rear view mirror. The purpose of these lights are to allow a passenger in the vehicle to view or read a map, directions, or see better in a specific portion of the vehicle without lighting up the whole vehicle.
A muffler or a silencer is a device used to reduce the amount of noise emitted by the exhaust of an engine.
A manual transmission uses a driver-operated clutch, typically operated by a foot pedal (automobile) or hand lever (motorcycle), for regulating torque transfer from the internal combustion engine to the transmission, and a gear stick, either operated by foot (as on a motorcycle) or by hand (as in an automobile).