I've been reading of egr / dpf / 02 cleaning problems with the new trucks and I have a couple of questions. 1st, is anyone using the EGR blockoff set up and how does it effect / help / hurt. Am I correct in assuming that with no EGR the engine and exhaust temps should be lower and the 02 sensors should stay clean? 2nd, DPF delete (or just knock the stuffing out and put it back in), same questions and I assume better power and fuel economy? Do the 08's have less problems than the 07's? Thanks for the responses.