Bought 3 these for my TRAXXAS TRX-6 to replace my locking motors. It works great and the build is awesome. The caveat with them is the mounting holes on on the servos are a little wider apart than the stock servos so I had to trim them down a little bit and cut the mounting holes wider. It is also a few mm taller than the stock motor as well, so I had to put a spacer in to get it to fit. All-in-all great servo as long as you realize it's not a drop in and plan for making the slight modification to your rig.