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I installed the Mini-Max, full flo-pro exhaust, and cold air intake on my 09 F250 yesterday. The power, even on the mild setting, is incredible. It will smoke the tires though all the gears. It is like a rocket, no kidding. (I will be looking at upgraded brakes).
I reset the gas mileage after a little testing and drove the remaining 10 miles home. According to the dash, I was getting 29 MPG. I'm sure this will be high, but it is looking promising..... I highly recommend this equipment, the manufactures claims are grossly UNDERSTATED.
I reset my fuel mileage totalizator and drove 28 miles to work this morning averaging between 70-75 miles an hour. According to the truck, I got 32.7 MPG. Gas gauge didn't even move.
I filled it up and reset the trip odometer for a little manual testing....