Conversion set for T4'20 to convert it toward T4'21 Graphite version. Includes all necessary components such as graphite framework, graphite top deck, human anatomy upstops & battery pack adj. width plates, composite 4 c-hubs for human body upstops, composite bumper top owner brace, composite adj. battery pack holders & backstops, springs, ECS drive shafts 52mm, aluminum steering dish 8mm, aluminum gear tensioner, aluminum engine mount, aluminum framework brace, aluminum rear suspension, holders with centering pin, steel solid drive shafts alongside parts.