A clutch is a subcomponent of a car's manual transmission system that engages and disengages the engine to the gearbox and transfers torque to the vehicle's transmission in split-seconds.
A clutch kit comes with it a clutch disc or a clutch friction disc and clutch pressure plate, although some clutch kits have pilot bushings or pilot bearings. The pressure plate contains a clutch plate, springs, cover and release fingers. Of the two types of pressure plates, the diaphragm-type is used more often than the spring-type pressure plate.