Your picture reminds of an additional thought. Stay away from Midas mufflers! They make the pins (on the ends of the muffler) that insert into the rubber hangers too short! I guess they're saving a penny or two cents on their cost.

Seriously, because they're too short, I've found that (despite using Volvo OEM rubber hangers), if the car corners too hard (I drive a bit enthusiastically :-) the muffler and exhaust pipes will shift to the side a bit and one or the other pin will pull right out of the rubber mount. Actually, even centered, the Midas muffler's pins barely extend through the width of the mounts.

Instead of the plastic ties you showed in your picture, I resorted to using those "caps" (that you hammer onto a simple cart's axle), along with a washer, to keep the muffler from falling off.