Kyosho Ultima 2WD gear differential set
Originally designed for the Ultima SC and DB line of 2WD off-road vehicles, Kyosho’s 2WD gear differential set also fits the RB6 and RT6 as well as the SC-R competition kits. The set includes all needed parts to equip ball differential gearboxes with a gear diff in order to maximize traction on high bite surfaces such as astro turf, carpet and sugared clay.
Source: Kyosho [kyosho.de]