I certainly #$%*ing can on the 550,its a few years old now and never needed adjustment since installed,ive even swapped it into a spare motor and back,its done a #$%* load of 6000 rpm plus drag launches,never slipped and nice smooth bite,if its the same parts now I don't know,i also have a complete spare kit new they were that good,both kits state the 6 plates were repos and the one large plate is genuine with genuine springs.