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LN has shared with me in the past their failure figures and I've posted them.
Porsche has admitted to their failure rates.
You are at least 10 times as safe without the Porsche supplied OEM bearing in there even including installation-caused ones in the counts.
By all means, don't hesitate to ask how many the mechanic has done ... not the shop. It matters a great deal. Also ask to see cam deviation figures pre and post installation.
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