U7164

[bagger09]

I have 2008 F350 Super Duty 4.10 gears. I have latest crom 9t13c. I have an s&b cai and a dpf delete race pipe. I have your tuner stacked with DPF-R 4.0. Do I need a custom tune to get the best performance and mileage. I was getting better mileage with a patial plugged dpf.