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I unplugged mine 3500 mi ago and was a definite difference in sound and will not go back to the quieter OEM way. I also disagree with the previous poster in that I think the sound is louder and of better quality than before. I have a 35is and I don't know if that makes any difference since the exhaust is different on it than the 30 or 35.
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Garage:
'11 Z4is
'09 Audi Q5
'07 Lamborghini Gallardo
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