1)No,you are NOT "allowed" to do what you want with it.
2)Nope-but they didn't run worse either.
3)Again,no you can't do whatever you want with your vehicles.
4)Bullshit.
5)You mean the ones of us that know what the fuck we're talking about? Your power/mpg improvement came NOT from removing SMOG gear,but from fixing a problem that existed.
6)Finally-you got something right.
There is no state in this country where it is legal to REMOVE SMOG equipment. In-op SMOG gear is not the same as working SMOG gear.EGR valves when working correctly, have ZERO effect on the engines performance.