Per the website:
"In 99.99% of applications we delete the [liquid-to-air] heat exchanger. The reason we delete the heat exchanger is because the intercooler fluid is so much colder than the ambient air temp that heat exchanger becomes a heater not a cooler. The only reason to retain the heat exchanger is if circuit racing the car."
Sounds (basically) like the hot liquid that departs from the intercooler goes through, and relies solely upon, their gadget for cooling before it traverses directly back into the intercooler again. (With, of course, a pump somewhere in the loop.)