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Keeping it in Sport keeps it 7th gear, hence the higher rpm. Isn?t the ACS an axle back? If so you should have resonators on there still...I could be wrong but pretty certain that is the case. I had this problem with my Meisterschaft Exhaust on my last car and it annoyed the hell out of me
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2014 X5 xDrive50i Mineral White | DinanTronics Stage 1 | Vossen HC3
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