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      03-14-2011, 02:15 PM   #29
IancoleTX
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Drives: 2014 550i M-Sport
Join Date: Jan 2010
Location: USA

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That can't be right. A ~50whp loss at 6500 rpm from installing an exhaust?

That makes no sense.

Also, did you just bolt up an n54 exhaust, or..? Just wanted to confirm there was direct fitment.
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2014 550i M-Sport AW/Blk Loaded
21" Forgestar CF10s Matte Black