I have a dent in my 04 YZF 450 stock rear exhaust. I dont think it will do anything to performance yet it makes me bleed everytime I look at it. How hard is it to get something like this repaired? Can they blow it out like they do with header pipes? I realise that I would need to take out the riverts, packing, core etc but can it actually get it blown out so it looks near new again? Or am I waisting my time?