The cooler had two large brushless electric fans.
This is what the unit looks like with the cover on.
The ducting is enclosed and exits right above the rear diffuser. The heat exchanger airflow fills the low-pressure wake made by the car to reduce drag and thus also passively sucks air through the heat exchanger at speed. The heat exchanger exhaust airflow also helps activate the diffuser for more downforce. The rear heat exchangers add another 30% capacity to the cooling system. The black tubes are for the chassis-mounted Varis Engineering wing.
If the temperature starts to climb out of the proper range, this CO2 sprayer is activated to provide another 2 minutes of additional cooling. The CO2 cannot drop the temperature but it can stop the temperature rise out of range.
Here is the front splitter under construction. The car uses an upcoming Heritage Spirits widebody kit to make room for the wide Toyo slicks. All removable panels are replaced with carbon fiber including all of the rear glass and the glass roof. In all over 600 lbs was removed from the car after the new stuff was added. The car is still very heavy at about 3800llbs due to the battery pack.