you can paint muffler black using VHT Fireproof spray coating (Matte Black) that is specifically made for exhaust temperatures. That is what I will be using- as the stock muffler is ugly as hell..can't believe BMW did not do anything about it!!!!. The quad tips will of course remain chrome but the muffler should be hidden. You can pick up a spray can at an auto store ...it is heat resistant to 1500F....
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