:agree:AIR system, EGR, charcoal cannister, PCV to carb. No cats. But (at least here in Colorado, anyway) it is not required to be in place. It was California equipment only (at least the AIR & EGR), but was installed on all cars. Therefore (I repeat, at least here in Colorado) it was not illegal for me to remove the AIR & EGR.
New Mexico was the same way. We could remove them and most did.