I also have an 08 F350 with a 6.4 that had only 15k miles when I got it in Feb. this year. I immediately ordered an EGR delete and complete new exhaust with 450RWHP program from RCD and did all the work myself. I am very impressed with this truck, most powerful rig I have and gets almost 20 mpg on highway. Pretty good for a 4x4 dually with 4.10 gears. Only has 22k on it now but so far no problems.