Below is a general manufacturer product group description. Please note the information below is not item specific. Item specifics are above in product details.

EXEDY cerametallic clutches are designed to handle the abuse of high powered modified engines. Our cerametallic friction material can handle much more slippage than stock type disc assemblies without slipping and fading. All cerametallic discs feature spring center dampers to reduce impact and shock loads.
We offer two types of cerametallic discs:
Normal Thickness (Thick)
Reduced Thickness (Thin)

Normal thickness discs have greater heat capacity and therefore better durability in demanding applications such as all wheel drive.
Reduced thickness discs offer greatly reduced inertia to improve shift efforts and improve synchro durability. These discs are approximately 1/2 the thickness of a stock disc and are recommended for track use only.