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      09-23-2010, 07:34 PM   #35

Drives: black 5 series
Join Date: May 2009
Location: ohio

iTrader: (0)

Guys I am not rying to rag on anyone but two 2.5 inch pipes goin back from that muffler is WAY to much. One single 2.5 inch pipe back from the muffler you have would be the right amount of flow as stock system. You need to go two 2-2.25 inch at the most if you have two pipes. The gases will just bog and not move fast enough. You can have the same look but it makes the difference in something that loses power or not