Thanks my man! In central Florida we dont have to worry about icing much here. Most of the year we deal with hot air so it probly is useless .betterthanyou said:It does not have an IAT sensor that tells the ECM the air temp. It does have a stove pipe that is designed to warm the air on cold mornings to prevent icing. It is completely useless and can be eliminated at any time you choose. It is simply a temperature sensitive vacuum valve that when cold will direct air to the vacuum actuator on the air cleaner lifting up the flapper valve inside and sucking in hot air from off the exhaust manifold.