First off, please be patient. I'm really trying to take in all the information but this is all very new to me so I'd like to ask a few questions to hopefully clear up a few things. I'll start with the DPF delete. What, by itself, does this modification do? Is it a power increase, a fuel economy increase, or both? Next, it appears that this modification must be mated to a tune in order to work properly because the modification requires that your regeneration cease. Is this the case and if so.....why? Personally, I could certainly stand to see a fuel economy increase but based on all I've read and the claims made about fuel economy, I can't remember a case where someone posted their numbers prior to the DPF delete and tune. Last but not least, will all of this harm the truck or is it simply an emissions issue and nothing else? If it IS purely emissions, then how would a person handle the state inspection which is required yearly? Thanks very much for helping me out. As mentioned above, I'm new to the diesel world and need all the help I can get.