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Innotech sounds the best in my opinion. And it has 3 modes to switch from, loud, quiet and auto. Best exhaust IMO!
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2015 AB/SO F80 M3 6MT | 19" Black M437 | KW H.A.S. | AutoTechnik Black Front Grills | BMW Performance Side Grills | Painted Front Bumper Reflectors | Gloss Black Exhaust Tips
GONE 2011 SG/Blk E92 M3 CS 6MT
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