During my y-pipe install yesterday the threads for my rear o2 bung ended up getting stripped and now the sensor will not stay in the cat. I have a new sensor already ordered, but what can I do to plug the hole while I wait for the new sensor to come? I'd like to not have to drive to school sounding like I'm running open headers.

But on another note, the VQ sounds badass at idle without being muffled

 

Find a bolt that fits or get a bung plug from a muffler shop.