Special wire reinforced tube under motor. Connects blower outlet (heater valve) to exhaust heat exchanger.
This is a much better product than the original fabric covered wire reinforced tube because it is not affected by either high temperature or oil contamination. That gives clean warm air to the cabin. It also keeps the internal diameter constant improving airflow while retaining the shape and curvature to join the blower to the heat exchanger.
Fits all Messerschmitt models from 1955 to 1964.