Already searched the forums, and I have only found a little info here and there for what I'm looking to do.

I have a completely stock 2009 Roadglide (California Model). I'm curious about how capable the ECM is at adjusting for changes.

1. Will Fatshots slip-ons alone require ECM remap?
2. Will Fatshots slip-ons and SE Heavy Breather combination require ECM remap?
3. If I combine the Heavy Breather with Fatshots would it be correct to reduce the number of discs to bring AFR back up compared to Fatshots alone? or would 10 discs & open cap still be a starting point?