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| 03-13-2012, 04:24 PM | #1 |
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Private
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Which makes more power?
Which makes more power? A catless midpipe such as the n55 one or a muffler delete? If you had to choose one. Car has catless downpipes and stock muffler. Thanks.
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2009 135i . Auto. Cpe downpipes, HPF intercooler, BMS intake. BMS meth JB4 with G5 board.
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| 03-13-2012, 04:36 PM | #2 |
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The Stig!
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Drives: 2008 135i 6MT
Join Date: Sep 2011
Location: Tulsa, Ok
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mids.
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2008 135i - FBO + JB4 15ohm + Water Meth
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| 03-13-2012, 06:19 PM | #5 |
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Brigadier General
 
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Drives: BMW S1000XR
Join Date: Jun 2011
Location: Gilbert, AZ
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+1 mids...just in case
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