My mother has an 03 6.0 and I have an 08 6.4 and currently have my truck tuned with the the h&s black maxx. My question is can i just take my tuner out and flash her truck with a tune for the mileage and return my tuner to my truck? Im sure you can but some insight would be helpful. She also wants me to do an egr delete too,which brand should I go with and how many hours am I looking at? Im sorry for all the questions Im not familiar with the 6.0 for the most part. My father has had 3 and egr coolers have gone on every one of them. I just dont want to see my mother broken down one day when i can prevent it. Truck has about 270k and still running strong completly stock.