Swapped out my old 14" K&N cone for a new 9" AEM Dry-Flow and all of the sudden BLM's are up to 133-136.  I know the ECM is still well within correction range, by why would this happen with just a new air filter?   Any reason to try and correct it or just leave it be?   Guess I could bump fuel psi a bit, more curious as to why this would happen.   Also noticed AF dropped to 4 at warm idle (was 5-6).