I never heard of a Hot Air Intake until I came to EcoModder. Check your IAT reading to see what your air temp is. If you can rig up a tube to collet air from around your exhaust you can get you intake air temps up to summer time levels so you can use less fuel. Don't go to hot though
There is a nice round tube protuding from the bottom of our air filter housing. Just turn the housing sideways and route a flexable dryer vent type hose to it. Block off the one going into the fender and you got hot air.