Looking for recommendations on which brand / size intake and downpipe to fit to my S3...
First and foremost I would like something quiet under normal driving conditions... I know gains are going to mean more noise, but I'd rather it be quiet than give me maximal gains. Noise when giving it some is ok, but I'd still rather it be quieter end of the scale.
Secondly, I don't want it to kill the low end of the car (below 3k rpm)... Also, why does it do this? Can someone explain the benefit in having backpressure to the turbo exhaust outlet?