Building on the earlier suggestion, I'm gonna play devil's advocate here. While everyone else is pushing for those heavy-duty cat-back systems, I've s...

^ This. Also, I have to disagree with just jumping into a loud exhaust or intake setup right away, especially with your warranty concerns. If you're r...

Seconding the recommendation above, 40A is the sweet spot. One big WARNING tho: stay away from fancy *smart* features if you can. The ID.4 software is...