Bank 1 and Bank 2 lean

Hey Guys,

I have a 06 V6 and I just recently installed
Momentum GT Performance Package they say an increase airflow by 119% they say,and also installed the
MACH Force-Xp 3" 409 Stainless Steel Cat-Back Exhaust System.

https://afepower.com/afe-power-49-46001-1b-mach-force-xp-3-409-stainless-steel-cat-back-exhaust-system

https://afepower.com/afe-power-52-76004-pk-momentum-gt-power-package

lately I have been getting the Bank 1 and Bank 2 lean codes. With the increase in air flow do you think i need to do a programmer to increase the air to gas ratio? I have used a injector cleaner threw the gas tank and before that I did seafoam as well.
I have cleared the Code a few times already with my code reader and I have done it by Disconnecting the Negative battery cable. I have also you some ether and sprayed all the vacum line to see if I have a leak and cant find any. I'm stupid now and cant figure it out. Any help would be nice.

 

If you still have stock air box put it back on and see if that fixes the codes. Or if they come back. Usually ECU can adjust AFR sufficiently to avoid lean codes. You could also have faulty sensors, seafoam isn’t that great for these trucks

 

I had a older CAI from AFE that was falling apart the I replaced it with the new one. and never once had a issue with the Bank 1 and Bank 2 lean codes. I also cleaned the MAF sensor before I moved it over to the new CAI.