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Old Wed, Dec-06-2017, 01:00:02 AM   #3
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Default Re: While the crank is being rebuilt...

Originally Posted by PITT M3 RR View Post
What’s the 5 from?!
No idea, it is cast into the exhaust runner, I've never seen that done on any other BMW or any engine for that matter, a manufactures mark for sure, batch number?
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