Yeah Racing Aluminum Heat Sink for 1:8 Motors Blue
This heat sink comes with mounting holes for two high speed fans for Motors with around 40.8mm 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 allow for a lower body mounting.
For: 1:8 Motors with around 40.8mm diameter; 57.9mm length