Check Engine Light: Engine running rich on both banks

[Richie Rich]

Just replaced my K&N Cold Air Intake system with the AEM Brute Force Induction System. Noticed a difference, however I am now getting a reading stating that my truck is running rich. Any ideas or fixes?

I also have an aftermarket MAF, headers, and Y pipe was cut for a true dual exhaust system. Computer has been tuned via superchips, if it helps.

Any thoughts or ideas is greatly appreciated in advance.