mufflers for around the house use?

hello all, I recently moved into a new house and don't want to piss off all my new neighbors (yet).

I was thinking to make mufflers slip on/off fairly easy so I can run the car at home with them on, and of course take them off at the track.

Just curious if anyone else has done this?? and if so, how? what? pictures?

I am thinking just a running a single screw into it after it slipped over the header...not like I will drive it on the street like this.
or some sort of pin.

its a 3" collector.
you could buy a pair of 3" y`s that have the side w/ a quick removeable cap.
oh, by the way, I just happen to have 2 new ones that have never been installed, I can send phone pics if your interested.----------------bob