Parts-Wise
air cooling, water cooling
53906201
All 356, 912 (65-68) Hub alternator impeller side, for 90 mm alternator.
53909314
All 356, 912 (65-69) Generator shim washer, pulley side. (On late 912 models with larger 420W generator also used for the impeller side). In total there should always be 10 used on the pulley side.
54606069
All 356, 912 (65-69) lower thermostat connecting rod. Comes as shown without bolt or ball socket.