I would not bother with the OCV, I do have both fiters removed from my 05 with the new ej257. Still have the orginal OCV's.
193k, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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