Check the tranny forum here for the Hexmod's upgrade your tranny will need.
Then get your valve cover seals replaced and go stage 2.
Your also close to AZPinstalls.com check them out too. Mike is on here alot and helps out here for free.
201,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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