This 40mm ESC cooling fan is a direct replacement and fits the Mamba Monster X 8s ESC.

Installation Instructions:
1. Unplug the fan from the ESC's receiver harness.
2. Locate the four screws on top of the ESC.
3. Remove all four screws with the appropriate driver.
4. Remove the fan shroud and old fan, replace with the new fan by reversing steps 3 through 1.