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      08-07-2012, 04:34 PM   #17
marcielago
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United Arab Emirates
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Drives: SG F10 550i MS, CB E39 M5
Join Date: Sep 2008
Location: Abu Dhabi

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My 550i got the CEL on AR catless downpipes.

Sound is amazing. I could say no increase in exhaust sound, but the whining of the turbos are more audible now. I actually been asked once if I had a supercharger on the car.

Love the whining sound.
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F10 550i M-sport: Space Grey/Oyster Black
E39 M5 : Carbon Black/Caramel
E39 520i : Titanium Silver/Beige (Sold)