This will NOT work with the stock 5mm Flex drive shaft (TRA5729)

Receiver box

Each gear set is made specifically for the listed Powerhobby servo model to help maintain proper fit

7 mm w x 38

or regulated power source supplying between 6V and 8

Castle Creations Cobra 5 8S 33.6V ESC 20A PEAK BEC w/1721-1260KV Crawler Tires This will NOT work withCastle Creations Cobra 5 8S 33. 6V ESC 20A PEAK BEC w 1721 1260KV The COBRA 5 is built with new tuning parameters that enhance braking control and independent reverse settings, helping reduce stress on drivetrains while offering smoother performance. Plus, advanced data logging now includes double the sample frequency, extended logging time, and new insights like ESC electrical timing and acceleration via an onboard accelerometer. Features: 32 Bit