I have a ford ais severe duty intake for free flowing clean air and a walker big truck muffler for easy flow exhaust. Seems to work good and neither were expensive. They are as quiet as stock. My truck came from the previous owner with a banks exhaust brake. The guy I bought it from pulled a heavy toy hauler. I have used it some in the smokey mtns and it does seem to work well. I have been warned about burning up the coast clutch so I don't use it as much as I used to. My tranny has 67K miles. I typically tow a 40' horse trailer with living quarters. Gross out 26K. Since I got my FU chip my mileage went up 2 mpg and my temps have gone down. I love it! If you tow heavy and it is an auto definitely want to get you a 6.0L tranny cooler. I made a run today on flat ga interstate and avg 19.2 mpg without a trailer running 75 on cruise. I used to get 16.6. This is out of a crewcab 4wd dually. Typically pulling a trailer from ATL to Dallas, Tx I avg 9.5 running 72-75 on interstate. I use to get 7.5, and my truck worked harder. I have really been impressed with their tuning.
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Mon, July 19th, 2010, 10:51 PM
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