I'm looking to start tinkering around with my 06' 5.9. Just looking for some insight from some experienced bombers. I don't want to get to carried away just yet. I don't want smoke, don't want noise. Mostly looking for Mpg increase and extra horsepower would never hurt of course. Not wanting to spend the money for a programmer right now.. so I guess I'm thinking intake and exhaust. What are your opinions for the best exhaust, and intake for my 06.. or is this in fact the way to go???