I mounted a 10" or was it 9" fan under the standard intercooler so it sucks air through the IC. It's wired via a Jaycar 50 C normally open thermostat switch that's connected to the IC outlet. I've also got a manual override switch in the dash. It sucks a lot of air through the IC and only comes on when the temperature rises above 50 C. Doesn't come on much at highway speeds but works well in traffic....