The Traxxas 3991X Gearbox Halves are engineered for strength, precision, and reliable drivetrain performance. Made from durable materials, these gearbox halves provide a secure housing for gears, helping maintain alignment, reduce wear, and handle the stress of high-speed runs, jumps, and rough terrain. Built to Traxxas factory specifications for a perfect fit, they are compatible with models including the Traxxas X-Maxx and Traxxas Maxx, ensuring smooth, dependable operation and long-lasting durability during every drive.