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my f10 535d muffler removed but still no sound at all !!!!!!
well..... about 10 times louder than the stock one but if rating 0-100 (100 is loudest). stock is probably 1 and x10 time louder is like 10..........
all the M is rated about 30-40
Last edited by guess2098; 08-27-2015 at 01:55 PM..
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