So i just installed the FSWerks exhaust, and adore it, however, i feel as though i need to compensate in my ap tune, and i do have ATR. However, my knowledge is limited, and it is a total noob question, but i figured i'd start somewhere. How does one go about compensating for a different system in a tune? i know gains will be nominal at best, i just want the peace of mind knowing all my performance modifications are accounted for.