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04-16-2019, 11:34 PM
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#16
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First Lieutenant 
Drives: 2013 BMW M3
Join Date: Sep 2018
Location: Santa cruz, CA
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Quote:
Originally Posted by BimmerPaul
I would like to know if there's real horsepower gains. I've read and been told that OEM headers are already perfected. It's a lot of money if it's only minimal amount of gains if any. And I'm talking about the headers alone without it being disguised.
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Also very interested.
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