I am currently using a Walker 3rd muffler on our 2008 Toyota Sienna Van. The first Walker replacement muffler lasted a couple of years, but the one I just replaced only lasted 10 months. A part is welded to the muffler where the pipe enters the guarantee from the front. In both breakdowns, the welded part rusts and then falls off. We're getting rid of the van soon, so it's going to be a problem for the next owner.