I had my computer reprogramed and replaced the air filter to a K&N in the stock box and gained about 3&1/2 miles per gallion after 30,000 miles No exhaust changes were made. I'm at around 19-20 mpg around town in my HD 2004 duramax Silverato double cab. The programing was done with a lap top.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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