This hose connects the thermostat housing to the coolant pipe that goes around the perimeter of the engine compartment. This hose is a bit larger on the thermostat housing side and impossible to find at any normal auto parts store.
Clamps needed
X1 #4 SS LINER CLAMP (sold separately)
X1 FUEL LINE CLAMP #1 (sold separately)
Ref ID: 025121058B
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