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Old 07-08-2020, 04:35 PM   #4
JarHarms
Scooby Specialist
 
Member#: 138994
Join Date: Jan 2007
Location: apparently I "spread the hate"
Vehicle:
2006 WRX, 6MT, 5x114

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One port is the blow-by to the PVC circuit. Other port is the crankcase pressure balance circuit between the cyl heads. You could block off the balance circuit but I would not recommend doing so. You are clearly turbocharged and would need both of those on each cyl head.
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