[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.