Tune a must for lower downpipes?

[anidroc]

How did you not see a difference with your Trucontrol? It's literally night and day.

It’s a different car I have awe touring catback, mishimoto intakes, ams race lower downpipes and the stillen TruControl set to the highest setting. No codes, no hesitation, nothing. It juts runs, and real fast. When I got the exhaust and intakes done they revised the tuning over the air . I’ll be data logging the car next week just to see what going on behind the curtain and report back.