Conversion set for T4'20 to convert it to the T4'21 Aluminum Solid edition. Includes all necessary parts such as aluminum solid chassis, graphite top deck, body upstops & battery adj. width plates, composite 4° c-hubs for body upstops, composite bumper upper holder brace, composite adj. battery holders & backstops, springs, ECS drive shafts 52mm, aluminum steering plate 8mm, aluminum belt tensioner, aluminum motor mount, aluminum chassis brace, aluminum rear suspension, holders with centering pin, steel solid drive shafts and other parts,
