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      11-24-2012, 02:51 PM   #7
Rowdy
Second Lieutenant
 
Drives: 2012 135i
Join Date: Oct 2012
Location: Hongcouver Canada

Posts: 236
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They have a slight pop and crackle now on the overrun. Other than that you should not hear or notice any difference as it does not alter the exhaust system in any way.
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