This is my first diesel. I bought the EGR/Cooler Delete Kit, 5" SS Turbo Back Exhaust, and MM3 Tuner with Ray's tuning from Double R Diesel last Tuesday. Everything arrived to my house by Friday, and I threw it all on this weekend. I just wanted to say how awesome my truck is now that I did these deletes. I should have done this when I got the truck a year ago. Also, I am extremely pleased with Ray's tunes on the MM3 and his attentive customer service.