Ack. Should have remembered the emissions system.
EGR valve. Seems it's actually legal to disable it. You might want to reread my post above.
So stock cars have airbags? Or do they come from the factory without them?
If I take out my front passenger seat (I've seen it done) I'm required to leave the seat belt?
If I put the wrong kind of dome light in my car that's illegal?
And the big question: where do used catalytic converters come from? Are we buying from criminals?