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Update, so I've been driving the car daily and to my pleasant surprise it seems like the issues I previously described in this thread have disappeared. The slight rumble at idle after the dealership replaced my valve cover and exhaust vanos solenoid is now completely gone. I'm also not noticing any weird gear shift issues (the RPM dip in Fritzer's video) anymore.
I'm not sure what changed between me picking up the car on 4/20/19, adaptations? I have zero codes. But its back to being completely smooth with no odd behavior at least for the past week. I'll post another update if I notice anything weird again.
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