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I wouldn't code ASD off because it can be quite helpful at times. For instance, my exhaust is straight from the turbo back, and I'm not going to lie, but it does drone a bit @ 80 MPH. However I was on the highway the other day and I noticed something. I noticed my car droned WAAAAY more in Comfort and Eco Pro than it did in Sport and it finally came to me as to why it was the case. The ASD acts as a form of destructive resonance (Ex. Bose Noise Cancelling Headphones) and cancels out a lot more drone. So in my case, it helps keep my exhaust a bit more tolerable.
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