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Bmw M3 Stock Exhaust Sound - Agency Power Catback Exhaust System Gold Tips BMW M3 M4 ... / Bmw m performance exhaust vs. . My new m3 exhaust sound, straight pipe muffler delete soon to come, stay tuned, also will do a full review on fuel consumption in. We show you the difference between the stock valve exhaust and the new lightweight 3d. Miah what's the full setup? Well, taxes are also different. Full exhaust system made of titanium 25kgs reduction in weight over stock exhaust system 100 cell sports catalyst peak power increase by 22hp peak torque increased by 35nm. Bmw m performance exhaust vs. Stock oem exhaust on 2011 e92 m3. Full exhaust system made of titanium 25kgs reduction in weight over stock exhaust system 100 cell sports catalyst peak power increase by 22hp peak torque increased by 35nm. This vehicle is nicely optioned with heated front seats, leather interior, navigation system, rear parking aid, hid headlights. 2009 bmw m3 for sale!!