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.
208,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here