I'm considering the XRT PRO tuner with the DPF delete option. Has anyone used this program without changing exhaust or removing the DPF? What is your impression? I know my performance results will be better if I remove the DPF but I'm going to wait. I'm being cautious in case I need to return my truck to stock. Thanks

 

Straight pipe it!

 

I definitely agree. I will be straight piping my rig once I purchase the delete kit.