VSR Pro Break In Block

The VSR Pro Break-In Block is engineered with bonded power rails for consistent, reliable performance. Simply connect it to your power supply to break in motors quickly and evenly—without ever putting laps on the track.

Three precision pockets also allow you to break in complete rear axle assemblies, helping gears seat properly and reducing wear before race time. A must-have tool for any builder or racer looking to maximize performance.