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      07-30-2012, 10:05 PM   #16
Second Lieutenant
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Drives: E92 M3
Join Date: Oct 2010
Location: New Jersey

Posts: 227
iTrader: (2)

Sorry I didn't explain fully. The second cat flows very well and the big restriction is the primary. My point was about sound and HP. Too much sound in my opinion with little HP increase. If you were going to mess with it, go with primary. It's your car though.
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