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For those who have done the Dinan upgrades: Have you experienced any issues with the N63? I bought my 2012 550i about a year and a half ago and I'd like to do the Dinan upgrade at some point, but I'm worried about doing anything to this engine ever since the Customer Service bulletin. Additionally, I've been reading about a lot of issues people seem to be having with the earlier N63s. I've been reluctant to really push this engine. Thoughts?
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