The turbo mouth piece and the hot side boost tube are the biggest bolt on differences. The stock air box is fine up to 500ish hp if you modify it. So you don't need an intake. I have and egr block off for the 04.5-05 if anyone needs one. If you want I can take you for a ride in my truck so you can get a feel for it. I have a turbo and injectors coming for it next week.