I made swiss cheese of the airbox, PPE boost valve, straight piped the factory exhaust, keep the tires at 75psi, plenty of diesel kleen in each tank and a feather-weight right footI have the same thing but only have it set on the 40hp setting and my milage is not that great. What else have you done to your pickup? I have a 4 inch magna flow exhuast and no gauges, which made me a little worried to tune it any higher. I still have the factory air intake because i drive alot of dusty roads. Any input would be great.