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Akrapovic Evolution Exhaust System (click for details) for BMW E90 E92 E93 M3
Features
-titanium end muffler, with TÜV
-4 titanium end tubes, with TÜV
-link pipes (titanium), incl. 100 cpsi Catalysts and Resonators
-plus 24 HP (at 4620 Rpm)
-plus 35 Nm (at 4890 Rpm)
-minus 23 kg (when compared with stock)