The clutch disc lives between the flywheel and the pressure plate takes most of the abuse of on and off clutch engagement. More forgiving organic clutch disc material can deliver noiseless and drama free driving, but incinerate under heavy launching or repeated clutch dumping. Metallic type materials will handle more heat and abuse but can have engagement characteristics unsuited for everyday street use. The clutch disc is also designed to dampen vibration and reduce noise. Unsprung discs are meant for race use only. Flywheel surface and material plays a role in clutch disc replacement. A full face organic clutch disc with a cast iron flywheel can hold better than a six-puck with a chromoly steel flywheel. Multi-plate setups add more surface area through additional discs and floater plates.
The pressure plate holds the clutch disc against the flywheel and with the help of the throwout bearing and diaphragm spring allows disengages mayhem when the pedal is pushed to the floor. Like the flywheel the pressure plate has clutch disc surface. An increase in pressure plate clamping force in along with a clutch material designed to stand up to higher heat can bring an increase in torque handling. More diaphragm spring clamping force can translate into a heavier clutch pedal and put more stress on the clutch fork, linkages and left leg. Greater clamping load clutch and overly aggressive clutch disc material can also translate into entirely unacceptable characteristics for street use.