what you should do is ; buy a length of copper / brass or stainless steel pipe of the same outside diameter then take it to someone who has a small pipe bender [ plumber ] and have it bent to the same shape as the original , then have the old manifold plate cut away from the old pipe and have this silver soldered to the new pipe section. also its not a bad idea to have an extra piece of flat matching material [ brass / stainless ] silver soldered to the header pipe at one end so the other end is bolted to the engine somewhere, this will give extra support to the header, make sure the cannister is also mounted soft .