Most recommend stock NGK's, I'm one step colder because they were $10.00 cheaper.
If you begin to have missfire or issues, put NGK's in it.
224,000miles 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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