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Yes,they said I was correct in thinking the lateral gas ports were indexed wrong and either were directly responsible or significantly added to the issue. They said the tune had nothing to do with the problem.Neither was detonation or pre-ignition. They also want me to change the ring package to thinner rings to add material in the intake valve relief to top ring area. Both of which I felt was needed before they told me their determination. I cannot be happier in how this is turning out even though it has cost several $$$$$$. The custom pistons by themselves would be over $1200 bux. IMO,JE Pistons really stepped up to this one.