The smell I'm talking about is unburned fuel. The owner-straight-piped AMG cars we get in the shop stink like an old carburetored car running rich. I don't want to get that stink in my daily driver.

As for the downstream O2 sensors, they've been disabled already.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon