I completely gutted the cats and welded in tube so there wouldn't be a balloon/turbulence in exhaust flow. I registered the car in a county that doesn't require emissions, using my mother in law's address
. I'm guessing the car burns clean enough to pass the sniff test, which is my frustration in Maricopa County, AZ. All they care about is if you modded the car, not if it actually burns clean. Go figure.