Im just getting into diesels and im trying to learn everything I can about modifying them for performance and I was just wondering why I hardly ever see anyone putting a bigger cam in a diesel like you would in a gasoline motor to get more power. Would a bigger cam not give a diesel more power too? Also, is there an exhaust size too big to run on a diesel, and would headers not give more power too? I see trucks with 5 inch pipes sometimes but some people have told me you can go too big. I plan on swapping a 6.2 in this summer when I find one and I want to modify it to get as much power as I can. So far, aside from a turbo and a big exhaust, I dont know much else to do to a 6.2 to get more power.