This Gear Box Set is a crucial genuine replacement part for the Kyosho Optima 2016 re-release 1/10 scale 4WD buggy, designed to restore or maintain the precise function of its iconic drivetrain. Constructed from durable, high-strength molded plastic, these gearboxes provide a robust enclosure for the internal gears, protecting them from dirt and impacts while ensuring smooth power transfer from the motor to the wheels. Essential for enthusiasts performing repairs or a full rebuild, this set ensures the vehicle maintains its original performance characteristics and reliability on various terrains, making it an indispensable component for keeping your vintage-inspired racer in top condition.