See: Exotek Racing

Exotek Racing have introduced the new Fan Blaster aluminium fan shrouds for 30mm and 40mm fans. Both the 30mm and 40mm shrouds are machined from high-quality ally, come black anodised and feature machined fin. The Fan Blaster shrouds will blast the fan air directly onto your motor for maximum cooling effect while also acting as a finned heat sink that adds additional ambient cooling. Importantly, the shroud positions the fan about 12mm away from the motor can to help prevent the motor magnets from impeding the fan motor and the shrouds lightweight alloy construction insures factory good looks and extra durable quality. Use the supplied M2.5×16 screws to attach the fan to the shroud and then attach the shroud to Exotek fan mount #1718 (sold separately).