Less emissions with Stock or Tune?

[Draupner]

Hi,
My MOT is coming up soon on my Dodge Charger R/T soon where they will check emission levels (I live in Sweden). I just wanted to check with you which might be better, go back to stock tune before the MOT or could the 91 CAI tune give better values when it comes to emission levels alone (CO2 and other gases)? I'm asking since I've experienced better fuel efficiency with the predator tune over the stock, but unsure if that equals less emissions also?

/Magnus W

[brandy16]

Go back to stock. It will pass with no problems. I have never tried to pass emissions with a tune in so I do not know if it would pass or not. I do not think it is worth the possible trouble to try it

[silverdaytona]

I passed the emission test here in AZ. with the 87 tune but they just plug into the obd port.

[lumpy69]

I passed with ease in Canada with the 91 tune