Usually these heating tubes suffer heavily from corrosion and damage.
These heating tubes will help many 1956-1967 Splitbus fans with a correct replacement. The tubes are sold in a set, suitable for repair of the complete heating tubes system that is located underneath the bus and inclusive the rear T-part till the cabin floor inlet.
These are designed for a LHD vehicle but can with care and skill be modified to suit a RHD vehicle.
We can also supply the central section on its own here