Originally Posted by m4a1mustang

If you plan on driving on the street in NOVA you HAVE to have cats.

Without them you'll get tagged at your annual safety inspection (they do a visual check) but you'd probably be pulled over by a cop before then when they smell the fumes.

You've probably noticed all of the emissions stations on most of the highway on-ramps. They rotate locations but they have them up year round now. You'll eventually have to drive through one of those where you'd get ticketed.