Funny, I never had any luck at all with cold air setups. On my '88 Merc 302, I gained 3 mpg by tossing the factory tube, opening the air cleaner entry hole, and sucking air from under the hood. On my '95 Dodge Ram, I'm going to make an old style open filter setup like on any 4bbl. carb and see what happens. I think most factory intake tubes are just too small to work at highway speeds.