The Team Associated B74.1 3 Pad Slipper Conversion is an upgrade that converts the kit 2-pad slipper to a 3-pad slipper clutch. The 3-pad slipper is an ideal tuning option for racers who prefer a smoother, more forgiving clutch. The stock clutch uses a 11mm I.D. pad with a heavy 500lb/in spring that is ideal for high-traction carpet. The 3-pad conversion uses a standard 19mm I.D. pad with a softer spring to create a smoother throttle feel with softer engagement that is better suited to dirt and low traction conditions. Instructions included. NOTE: B74.1D kits require the ASC92275 RC10B74.1 Slipper Shaft Outdrive Set (not included) from the RC10B74.1 kit.