What's the difference?

[Infiniti_B11]

What's difference between AT Fed and MT Fed or MT Calif and AT Calif?

[MinisterofDOOM]

AT and MT refer to automatic transmission or manual transmission.

Fed and Cali refer to emissions equipment. Since California has special, ultra-strict emissions standards that are different from the federal standard the rest of the country uses, there are two different versions of some Maxima generations. Cali-spec cars have additional emissions equipment that keeps them eligible for registration that state.

[Infiniti_B11]

o okay hope i got the right one it was a fed but im not sure if it was at or mt