Quote:
Originally Posted by Soliditude
I, unfortuntely, never drove the car inbetween, but there would be no gains if I had. That's why I'm wondering about yours. I have the heavier xDrive, like you, and I still noticed the gains right away. The program must match your VIN 100% or it will not work. Did your exhaust note come louder when accelerating or did it stay the same?
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yeah it is louder for sure...