Originally Posted by zeroptzero

I spent the day in Toronto for work, on the way home I was driving behind an Audi S3 on the highway. I noticed it had a modular exhaust which was very cool, it had four tailpipes and two of them had electric flaps that opened and closed at different speeds. When the car stopped the four pipes would be fully open, as the car drove off at lower speeds two flaps would close. Then at higher speeds the two flaps would open and four pipes would expel exhaust. In stop and go traffic the flaps were constantly in action, wonder how reliable they would be in the long term, very cool system though.