I just got a new 08' and wow what a truck!! It only has 75 miles on it but I figured why wait to start working on it (my motto is " If it aint broke make it go faster") I was looking at the exhaust and it is dual all the way to the muffler and then single out. I'm looking for something that will help performance wise but not drive me nuts on the 200 mile trips. And does anyone know if the 2 degree timing change should be done on the 08'?