Believe what you like but I don't see how either of those toys will do any good. As mentioned below already, if you saw an increase from using a K&N filter, then the old filter was already plugged... but I don't see how you would even see an increase because of a plugged filter on a modern engine. Most all gasoline engines today use a MAF sensor or Mass AirFlow, so it measures the total volume of air going into the engine and then computes the injector firing time based on that data. If you have a plugged filter or some other gadget stuck into the intake system, the MAF or MAP sensor will account for it... and then fire the appropriate amount of fuel. From what I saw on the cyclone website regarding mileage claims.... they basically only tested an old carburated engine or at best a throttle body injected engine with a more primitive control system, so mabey there was some gain there... but I doubt you would see any gain on a tune port/multi port injected engine.
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Today's Featured Article - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
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