Powerstar PM-1610 HV servo
The Powerstar PM-1610 high voltage servo is designed for heavy duty applications such as 1/8th on-road and off-road. Offering a transit time of 0.09s and a torque of 18kg-cm at 8.4V input the all-alloy case servo is ideal for steering and throttle/brake duties alike. Sporting dimensions of 40x20x37.2mm it weights in at 77g and comes with stainless steel and titanium gears as well as a brushless motor.
Source: Powerstar [powerstar-racing.com]