Has anyone tried using a set of these Headpipes from MikesXS to replace the factory Headpipes? I realize the I'd have to cut off the old Headpipes and weld on the new ones which is not a concern. I am wondering if the bends on them are the same as the original and if I'd need a flange where the Headpipe attaches to the muffler. My mufflers are solid but my Head pipes are pitted pretty bad. I'd love to be able to salvage what's good and replace what's bad if it's possible.