See: 6MIK

6MIK have added to their Optima range of option parts a new 30mm aluminium high-speed cooling fan specially designed to fit the HB Racing E817 and E819. Designed in France, the high-speed fan provides steady performance and a better lasting of the motor especially in hot weather conditions. Available in black and red colors, the Optima fan comes with a long and high-quality silicone black wire with JR-style receiver plug and it can be mounted directly without modification on the HB E-buggies.