Maxx High-Torque Metal Gear Servo The Maxx-Duty metal-gear steering servo features full all-metal gears and ball bearings for increased precision. The Maxx-duty servo puts out 23% more torque than the standard 2085 servo to take on the most extreme environments. The servo includes a stiffer servo saver spring and steel steering linkage for maximum steering authority and control during high speed driving. Stock part(s) for these models: Funco Pro Scale Replica 109076-4 X-Maxx 77096-4 X-Monster Chassis 77036-4 XRT 78086-4