There have been other threads in the past on this topic, & it just flat out amazes me that NOBODY who works in a chain muffler shop, or auto parts store, is even slightly inclined to think outside the box...

If it's not in the database, there is nothing that can be done.........
I realize I'm painting this picture with a pretty broad brush, & there may be a few exceptions, but seriously... It's a MUFFLER.........
The dumbing down of this once great nation continues...