Exedy 2005-2005 Saab 9-2X Aero H4 Stage 2 Cerametallic Clutch Thin DiscStage 2 Cerametallic clutches are designed to handle the abuse of high power modified engines. Our Cerametallic friction material can handle much more abuse than stock type disc assemblies without slipping and fading. The THIN discs offer greatly reduced inertia to improve shift effort, allow for quicker shifting, and improve synchro durability. These discs are approximately half the thickness of a stock disc and are recommended for circuit track use