That is a catalyzed exhaust! Just a guess but I doubt there is a re-stricter in the header, Doesn't hurt to look tho. you could remove the plumbing, and have the holes welded, and if you go that far I would cut the muffler open to by pass/ remove the converter. A die grinder, and an hour or so is all it would take. You can then get the whole shebang re welded for maybe $40.00. You can check the VIN on the down tube for the frame for the year. There is a series of letters (8 of them), and the year code is the next 2 numbers (08/09 whatever) I just checked mine to be sure, and found what I have been posting as an '04 is actually an '01.