Harley screamin eagle pro efi super tuner
 

BlUF: Bought super tuner in 2011 when I put pipes on bike (2011 Fatboy), went back to Iraq from leave, came home and the little white box, with the cute orange tuner in it had "poof" disappeared.

If I do no other mods to the engine will I need this part for anything else?

You only need it if you want to use your SEPST software with your bike. I assume you already have installed a tuned map.