Bringing this back from the grave, but I just put a fswerks cold air kit on my transit. Did a hill climb test 3 runs before average time to top 19.81, 3 runs after install avg 19.78. Same day, air temp only 1 degree warmer, engine to operating temp both times...and the survey says...no appreciable difference...bummer. At least I only had a hundred in the kit as I bought it off a pal down on his luck.