Data logging will show you that, and when you buy the tune they can advise you on how to do that. Bama is great, once you get the tunes go ahead and do what they advise in regards to pulling data with the tunner and if it's on target compared to what they normally consider on target then you should be good to go without issues. If corrections are needed Bama will take care of you.
However, If you truly have a major issue it should throw a code/check engine, etc. I've only had one major issue and threw a code only once when my JLT Oil catch came loose and I had a vacuum leak. Luckily I had the original connection laying around so that was a simple fix.
Cobb Access Port
MAPerformance Tune, CAI, and Intercooler
NGK 6510 Sparkplugs
Everything else is for show.