Thread: What Can Be Done To Increase Engine Noise In Cabin (Without Voiding Warranty)?
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      11-20-2012, 11:07 PM   #2
Khrishna
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Drives: M3
Join Date: Nov 2012
Location: UT

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Retrofit BMWs new "vroom vroom" software engine sound thru the speakers.



OEM exhaust mod or air filter wont void your warranty.
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