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my BMW guy sent out a warped 733 head to a specialist
they heated it up in a jig and unwarped the head by bending it back in to spec
car ran fine afterwards intill stolen a year or so later
he said cutting the head would mess up the cam chain tension
and the hot unwarp method was better
saddly the guy died and I lost a trusted wrench
so no idea who he sent it to
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