The 5 O-rings that go between cylinder and head, remember there is no head gasket just these O-rings - replace these when you do a proper valve adjustment on all bevel drive twins by removing the heads.
Qty 2 of Ducati #0400.17.030 (040017030) and qty 3 of Ducati #0755.17.030 (075517030).
NOTE: These are OEM Ducati O rings - not old stock - 1 kit does both cylinders of your bevel drive twin.
