I am about to buy headers, the ceramic coated Heddmen shortys. The good thing, 80 bucks from a member. Ive never changed my headers on any trucks, so I don't know what to expect as far as gains, or problems. Can someone give me a quick plus/negative of this mod? Do I need a tune? I was told no once, I just need to be sure, with my current mods, that I'll be fine. Thanks for ANY insight.