Conversion set for T4'20 to transform it to your T4'21 Aluminum Solid version. Includes all necessary components including aluminum solid framework, graphite top deck, human body upstops & battery adj. width dishes, composite 4° c-hubs for body upstops, composite bumper upper holder brace, composite adj. battery pack holders & backstops, springs, ECS drive shafts 52mm, aluminum steering plate 8mm, aluminum belt tensioner, aluminum motor mount, aluminum framework brace, aluminum backside suspension system, holders with centering pin, metal solid drive shafts as well as other parts,
