Muffler

And that's still kind of going on, the Cola Wars.

But there were the Muffler Wars.

When I was a kid, I thought that getting a new muffler on your car was going to be a yearly thing.

They had shops that only did mufflers.

Kind of like tire places.

The only new tires.

Muffler places that just do mufflers.

Check this out.