Fits 1990-1997 Big Twin, 1991 & later Sportster, 1991-2002 Buell. Includes 9 friction plates with race proven friction material on tempered steel cores. Starburst groove pattern for maximum heat dissipation and oil circulation. Included are 8 tempered steel drive plates. Pre-set stack height for easy installation. 15% more surface area than stock for high performance strokers. This kit includes a 15% stronger than stock diaphragm clutch spring.