Rubber lower radiator hose for the single point injection cars only-
See
C-GRH1242 for an improved Blue silicon lower hose for longer life,better looks, or for hotter climates,there is little price difference for a better quality hose. Heater pipes run as follows
heater to bottom hose
heater to valve-valve to thermostat via
PCH10532 T shaped hose and to inlet manifold-
then inlet manifold returns to bottom hose