1/10 RC10B74.2D 4X4 Electric RC Buggy Team KitChampions by Design The engineers at Team Associated's Area 51 set out to extract more performance from the RC10B74 4WD buggy platform with the introduction of the RC10B74. 2 and RC10B74. 2D. Our goals were to reduce overall weight, lower the center of gravity, and improve jump and bump handling. We exceeded expectations. Features New lightweight molded gearboxes front and rear: Two fixed height front gearboxes allowing 0 and +2mm diff height options.