Ok, I'm getting ready to do my H/C/I swap, I have the combo listed in my sig. My question deals with my headers as I was planning on keeping the stock exhaust headers but someone said I'd be killing alot of HP. I was only figuring I'd gain maybe 7-8 rwhp with a set of aftermarket headers. I did just get my heads and lower intake back from porting and the guy did a great job of porting as they look pretty hogged out. So with my opened up heads and intake, would I be losing more than like 8 hp? I already have the offroad X and I'm planning to cut the cats off. Headers are expensive so I kinda don't wanna throw 200 dollars toward them when I still have to pay for a dyno tune. (Or do you think it would be a better Idea to get a mailoder tune from dirty racing 180$ and get the headers?)