searching on the web I found that information about porsche boxster engine codes and I would like to share it with the group.
Engine codes as follows
M96.20 Boxster 1997 - 99
M96.22 Boxster 2000- 02
M96.23 Boxster 2003 - 04
M96.21 Boxster S 2000 - 02
M96.24 Boxster S 2003 - 04