These are direct fit parts to replace stock arms

Dimensions: 42

Operating Voltage: 5

Optimized weight balance via extra mounting holes allows the motor and battery to be mounted at the rear of the chassis for improved rear traction and jumping balance

Hot Racing - Hot Racing Aluminum MFC 5th Wheel Coupler 470 620, King Hauler KYO34116 These are direct fit partsHot Racing aluminum 5th wheel coupler used on Tamiya 1 14 scale R C tractor trucks outfitted with the Tamiya Multi Function Control Unit (MFC), King Hauler, Grand Hauler, and 470, 620 Chassis. YOU WILL RECEIVE: One (1) 5th wheel coupler COMMENTS: Replace stock Tamiya Part number 10225105 Part X3 Use Tamiya instructions for installationFeatures: CNC machined aluminum, anodized black Replaces plastic MFC 5th wheel coupler More secure and greater