I saw my exhaust has broken off in front of the muffler, where there is a clamp. I have a Made in Canada 2005 Corolla LE, 5spd. It looks fairly benign. My mechanic has told me the entire exhaust system is "one-piece" and needs to be replaced from the catalytic converter, to the end, even though he admits most of the parts are fine. He made a special point of saying it was special, a Made in Canada Corolla (which arouses my suspicions immediately). It's a bad spot for sure, right in front of the clamp, but an entire $800.00 exhaust system, not including Labor? Does this pass the sniff test?