High performance extra plate kit for 1941-1984 Big-Twin. Includes 6 Kevlar® friction plates with 6061 T6 aluminum cores & 5 tempered steel drive plates. Also included are 10 ZERO CRUSH coil type clutch springs. Stack height is preset for easy, accurate installation (run wet or dry).Stack Height: Frictions and steels 1.575 to 1.590"