5.4 e-fan
I dont know if that fan by itself will keep things cool. I ended up doing one 16" 2300cfm fan and a 14" fan to go with it. That way it covers more area of the rad and so far it hasnt heated up at all.
I dont know if this counts for the gas superduty but I know the diesel guys dont run e fans because they will not cool the engine enough to tow anymore then 5000 lbs



