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ChevyCowboy4x4 -> RE: K&N COLD AIR INTAKE? (5/26/2007 6:01:25 PM)
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well, if you only upgrade the intake than yes, your economy will go down because your engine still isnt breathing as well. your computer is basically adding more fuel to keep from running lean like ZX1100F1 said. but to improve your economy, look at getting a free flowing exhaust, like flowmaster or magnaflow to accompany the free flowing air filter. and on another note, a quicker and cheaper way to get a K&N filter is to just buy the stock replacement one. the FIPK advantage is just that you recieve a cone filter and a new air intake tube. you save almost $200 by just getting the direct K&N replacement. personally, on my 6.0L, i noticed a significant increase in gas mileage once i put the exhaust and filter on. i went from 200 miles to a half tank to almost 270 miles. but that's also because my driving habits didn't change much. sometimes when someone gets added performance their foot is always in the radiator, and thats when people start to say that performance parts don't help fuel mileage. they do, its just that the driving habits of the driver change. dont change your driving habits and you should notice an increase in fuel mileage within the first couple fill ups. good luck!
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