I have a 2003 f-350 with a 7.3 powerstroke and i am thinking about installing an aftermarket air intake system but i was told by somebody that since i live in northern new hampshire and we commonly have temps. below zero that if i used one of these system the truck would not run right because it would be getting to much cold air. If anybody has experienced this problem or knows anything about it please let me know. Also i am looking for suggestions on which systems is the most recomended. Thanks for the input.