really gonna do anything. stillen (STEALIN) claims alot, but use their stage charts and see how much RWHP you really have on a dyno. and if headers really gave 18RWHP, don't you think more people would have them, or they'd at least be one of the first mods to get for an NA?? 18RWHP is alot. you'll get a gain from headers, but nothing like what you think...