The steel drive plates for 1941 thru 1984 Big Twins are available with or without anti-rattle devices. These anti-rattle devices will silence the movement and noise in the clutch basket. Both styles of plates are sold separately, or as sets of four plates for 1968 thru 1983 models or sets of three plates for 1941 thru 1967 models. Thickness of plates is .115" (2.9mm).