Team Zombie have introduced their new Hollow Evolution motor cooling system. The 40mm motor cooling fan features a dedicated duct-type housing that is part of the whole fan assembly, rather than just a computer-type can sitting in an additional case. The result are 12g of static pressure and thus exceptional cooling performance thanks to the optimised airflow design. The 6V to 8.7V compatible and dual ball-raced fan uses an injector-moulded case, it weighs in at 18.5g