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My last two Blackstone reports on my ZHP with the M54 have had high lead so I consulted my trusted and well-known indie and he said that they've never heard of the M54 having the same issues as the S54. Although they are related the bottom ends are significantly different. They told me not to worry unless I begin to have some sort of ill effects, although, with all the maintenance I've put into that car to make it go another 150,000 miles I'd rather replace bearings before I have any ill effects. I'll be interested to see if anyone else has any input.
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