LS swap In Arizona

[tucsonjwt]

The only emissions exemption in AZ that I know of: rare classic car driven mostly to car shows, and has classic car insurance, or 1966 or older.

https://www.azdeq.gov/environ/air/vei/motor.html

I know people with non-original engines whose vehicles are registered outside of Maricopa or Pima counties. Those vehicles could not be legally registered in Maricopa or Pima.

http://gisweb.azdeq.gov/arcgis/emaps/?topic=vei

Here is some information from EPA about engine swaps written in lawyer talk. This does not cover state requirements, which I have not found written anywhere in AZ. It seems to me that the feds don't like engine swaps unless it is from a substantially identical vehicle. Bottom line - the burden is on the vehicle owner to prove that an engine swap meets EPA and state standards, and those standards are either hard to find or non-existent for engine swaps. You still need to cross the hurdle of "tampering with original emissions equipment."

http://www2.epa.gov/sites/production...ngswitch_0.pdf