I just put one on my Demon. I have Hooker headers, but not the ones they specify to use with the kit. I also changed a few things, like added some cut outs and used the factory tips. If you have it exactly as they spec, it might be a true bolt on. I ended up cutting and fitting pieces to make it work, and actually had to use pieces in the incorrect position. Overall fit is probably about 6/10 on my application. I'd have been money ahead having an exhaust shop custom bend a system.