Originally Posted by 73f250cummins
Go Dptuner, i have it and love Dp. Truck has a huge power improvement and 80hp eco tune i was seeing 18 mpg in the city and up wards of 26 on the highway, But i would go with the f5 or switch from Dp alot more use out of it.
I am thinking the F5, I have a manual trans so is the F6 really worth double the price? I am not racing it just want a bit more oompf.