Competition Clutch Stage 3 Segmented Ceramic Clutch Kit for 2004-20 Subaru STI. The Competition Clutch Stage 3 Street/Strip clutch features the same functionality as the popular 2300 series but without the need for a break-in procedure required with Kevlar friction surfaces. The segmented Ceramic material with a performance pressure plate is suited for 150% increase in torque capacity. The 2600 Series kit includes a performance pressure plate, a high torque sprung disc with segmented Ceramic facings, all applicable bearings, and the appropriate alignment tool.