This is the Hitec HS-646WP High Voltage Analog Waterproof Ultra Torque Servo.
RPM LCG Nerf Bars have added structural support to help strengthen the body and reduce impact forces transferred to the chassis. The additional cross bracing optimizes the rigidity while absorbing additional impact energy anything less than RPM would have
RPM Nerf Bars Black Slash/Slash 4X4 Composite plastic, black in color Protects the sides of the chassis from side impacts, roll overs and T-bone crashes