Following is a parts list for replacing the intake manifold 'REAR COVER WITH NON-RETURN VALVE' which is the likely cause of many poor/bad running V-8's [ if the repair hasn't been done yet ]

[1] 11 61 7 501 562 cover with non-return valve
[1] 11 61 1 729 728 rear gasket
[1] 11 61 1 747 085 cap plug 5.0mm
[1] 11 61 1 437 694 cap plug
[7] 11 14 1 460 752 torx bolts

IF Intake Removal Is Necessary [sometimes is because of those bolts]

[4] 11 61 1 433 328 intake manifold gaskets
[1] 11 61 1 729 727 front cover gasket
[1] 11 15 1 747 978 o-ring [for the breather pipe that runs from the
rear cover to the front of the left cyl. head.

hope this is of help to some of you out there. [ see EggRaid posts, etc.]
best to all............................................... ..................................jb.