I've heard that headers on a 99-01 Cobra really don't help until you get into higher horsepower ranges. But I've also been reading on here that some people have a full exhaust set up as their only mod and are making pretty good numbers on the dyno. Right now I've only got an off road X pipe and a Mac catback. Would it be a good idea to put on some headers, or will it just hurt me right now?