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Hey buddy, I have the Dinan axle-back on mine, which I'm told is only slightly louder than the M Performance exhaust. I was looking at it too, but went with the Dinan because I found one used and BMW was willing to do the install and warranty it. I'm happy to come by and give you a ride to check it out whenever you want. Let me know.
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2011.5 E92 M3 DCT - Dinan Exhaust - OSS Angel Eyes Blackout - BMW Performance Splitters & Spoiler - Black Grilles - V1 Hardwire
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