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Old 06-18-2009, 12:00 AM   #58
Scooby Specialist
Member#: 32576
Join Date: Feb 2003
Location: Allentown, PA
04 STI
Roller Barrel ITBS


Newer Subaru manifolds have much larger runner DIA than almost all other stock manifolds, and thus will flow much more than comparable stock manifolds. They could use a little more plenum, larger TB, and flow balancing.
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