I can tell you that the stock headers off a 06/07 second gen zx10r will fit a 3rd gen cause I got a set and did a areap/06 stock gutted headers on my friends 08 zx10r...I would say yes they will fit but there might be a line up issue where the cat/header meets the mid-pipe going to your can. I would say go ahead and give it a shot and if they don't line up 100% at least you always have your stock headers off sitting there waiting to be gutted!! But I think it will work!! I mean the stock ones did and usually most manufacturers make the headers line up the same LOL...Good luck and keep us posted on top of posting up pictures!!