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      01-11-2012, 10:39 PM   #133
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Drives: 2006 M Roadster
Join Date: Mar 2011
Location: CA

iTrader: (2)

Why didn't DKF compare before/after with the same headers? The headers alone are usually responsible for a 20+ hp gain. I'm a little disappointed as I really wanted to see what I could expect on an N/A car that already has Euro Headers.
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