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I believe the orange part is a sound insulator for the carb heating system. The shorter black hose fits on the tee connector on top of the dog house. The other end is fitted to the nipple on the right side of the engine compartment. When the heater is in the on position, warm air is routed to the hose and then directed down to the tops of the carbs. It was changed in MY '68 with the warm air routed to tubes positioned under the carbs. Rear window defroster tubes are single tubes, on the left and right of the engine compartment fed from the same heat ducts in the longitudinals.
Tony
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Tony
1973 914 2.2 FAT Black
1974 911 Targa Lime Green
2018 Macan GTS White
2019 Targa GTS Agate Grey
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