Thread: New HPF N54 Intake Manifold for both 135i and 335i - PICS
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      12-07-2011, 07:15 PM   #5
Freon
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Drives: 2009 135i
Join Date: Nov 2007
Location: Indianapolis

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What directions did you go from the factory manifold in term of runner length, runner diameter, and plenum size and why?
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2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
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