[2plankeroc]

Anyone running an aftermarket catted downpipe and have experience with emission testing. Curious if you are having an issues passing or not and also what you are running. I'm looking at the AR catted pipe on my 340i..

[co_440i]

Check this to see if you actually need to do it.
https://dmv.colorado.gov/gas-emissions-requirements

I'm in El Paso county and we don't require it, but my 2017 would need it in the appropriate county. I have the MAD downpipe and would probably swap back to the stock downpipe for the test, the job isn't difficult.

[2plankeroc]

2016, so I need it every two years.

[classybum]

Originally Posted by 2plankeroc

2016, so I need it every two years.

did you ever go down the catted downpipe path? it's next on my upgrade list, 2016 340i. there's a facebook group, colorado cars and coffee, and the discussion there sounds pretty gnarly (tough to pass) if you have to go in for the in-person tests.

have you heard about the roadside testing? apparently if you pass two of them per year, you can get out of the in-person testing.

https://aircarecolorado.com/how-it-works/rapidscreen
https://aircarecolorado.com/locations/van-locations

[2plankeroc]

I have not done the down pipe yet. I figure when I do, I'll just have to pull it and go back to stock for the emissions test.

[Moose30]

From my understanding a catted downpipe probably wont pass smog in colorado. Its east enough to swap back and forth so if you have the time you can go get it tested with the aftermarket downpipe and if it fails you have 7days to swap to oem and retest.