I would do exactly that. Look for a mod friendly dealership and you may want to just come clean with them. And your looking for a second opinion. But I would throw the stock exhaust, that's a pretty quick job to save hundreds on a new cat.
I'm having the same concerns right now on the way to work stop at Starbucks and speed bumps as well. And I think about it I believe that it's coming from the 2 piece drive shaft.
As a mechanic is Arizona I know all about pac rats and having to repair wiring. It's the nylon on the wire they love. Get yourself some women's pantyhose (made out of nylon) and put some rat poison in it and drape it over the engine during storage and while useing it and a daily zipp tie it up...
1200.00 due to damage pick up. May consider offers but let's be realistic your pretty much getting tires for free. I'm just not trying to retire on this deal. But I'm not gunna give them away either
I have set that I just took off with 850 miles. Buttttttt......... pass front unfortunately has some curb rash in three small area. But if you ask me I would call it light scratches. Took them off 2 days ago.