This is a replacement Kyosho Gear Box Set, and is intended for use with the Kyosho Ultima RB5 and RT5 1/10 scale vehicles. This is the B version of the Ultima gearbox set, and has been improved for strength and reliability. These parts come stock with the Ultima RB5 SP kit and replaces part UM508.
Kyosho Ultima RB5
Kyosho Ultima DB
Kyosho Ultima SC
Kyosho Ultima RT5
May fit other models please check your parts manual for compatibility with your vehicle