[PxTx]

Since the smog checks are done state by state vs a federal test, it's critical to know what type of test your car will be required to pass. Without kowing the specific test you will be required to pass, I suspect engine configurations would be more conservative.

I also suspect that NA tunes will fail smog checks at hp numbers well below those of the forced induction configurations.

I don't mean to thread jack here, just thowring out a bit of a reasonable man's logic.