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      01-04-2012, 06:42 PM   #5
MilehighM3
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Drives: Harrop E90 M3
Join Date: May 2011
Location: Colorado Springs

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2009 E90 M3  [6.50]
That looks very nice guys! One thing about going to aluminum from plastic is that it will retain a lot more heat. I did that years ago on my E36 M3 when I installed a Shrick manifold. With the supercharger I had installed I saw an increase of nearly 40 degrees before and after the install swap. So I gained power, but only until heat soak set in...
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