Burton Car Company has made a rubber version of
the original cardboard hose (A1.8911). The rubber
is more flexible than the previous variant.
Because of the 5 ridges instead of 3, this rubber
has more room to move and will stay in place
better. This rubber has a good fit. This rubber
part is placed in the inner fender to take away
heat from the engine. It replaces the original
cardboard tube, and will last longer. Fits 2CV6
(not on 2CV4) and Burton.