There were two alignment pins that came with the Bigserts. The OD of the holes you drill to install the Bigserts is just larger than the stock pins so it appears that you are supposed to use these. They have a shoulder that installs downward and the minor OD is upward. The directions are a bit brief on this issue.

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2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,