Yeah Racing Heat Sink with Twin Tornado High Speed Fans sets for 1:8 Motors with around 40.8mm diameter
This heat sink comes with dual high speed fan for Motors with around 41mm diameter. The air-flows can be further enhanced by adding washers between the fans and the heat sink. On the other hand, you may install the heat sink without the washers to save space.
For: 1:8 Motors with around 41mm diameter; 57.9mm length