Kevlar clutch kit for Big Twin 1990-1997 and Sportster 1991-later. This Performance Extra Plate kit includes 9 friction plates bonded to tempered steel and 8 tempered steel drive plates. Eliminates double riveted drive plate. Also includes 15 percent stronger diaphragm spring. Replaces HD 37911-90, 37913-90 and 36792-91.