2008 Ram 1500 SLT 5.7L Hemi. I installed a dual ram air intake with K&N Filters & a Cherry Bomb Glasspack Muffler. I heard somewhere that sometimes your computer needs to learn the new airflow, etc, and that I should disconnect the battery overnite to help this process. Any truth to this? Thanks in advance.

 

It will learn the new airflow whether you reset the computer or not. In all reality, the changes you made aren't that significant, and the computer should figure it out almost immediately.

 

No need. You don't need to do anything with the computer until the major mods start. Installing a canned tune with a handheld tuner will take advantage of what you've done already.