[Mr. Luos]

Well, emissions is something that can be changed with a set of headers.
EGR you don't have.
AIR you do. If you were to get race headers, you would have to have the codes removed for the air pump. Also, it depends on what kind of emissions you might need to pass. Sniffer? Visual? ODB? It all depends.

Headers....I run race headers. No EGR or AIR hook-ups. I will figure out what to do about emissions when I need to. I know it won't pass, so......

Any difference in performance??? Probably not.