A few things of note during my exhaust replacement saga on my 2008 Cheewawa. After six years since the last install, everything to do with the rear is practically rusted out, so basically, I had to "brutally wrench out" the whole thing. I needed newer bolts for the exhaust (2) to connect it to the cat, so I ordered 2 smart head bolts. They fit beautifully. I also needed newer bolts for the heat shield and got some hex from Lowe's. Then, the rear impact bar's 6 bolts, ordered from MB at some :$2.50 a pc; since I'd broken off one, I might as well get new ones all round.
Working alone most of the time, I had to be innovative when it came to the tricky part. One particular lightbulb moment was when trying to hook the exhaust ends to the rubber bongs; I put a jack underneath the left part of the base to force the end, which I'd lubed, into the rubber holder. It was such a sweet moment! No sweat at all! (see my pic up there, in earlier post)