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Firewall® Heater Hose
Firewall® Heater Hose is an extra heavy-duty hose designed for maximum durability. It is unaffected by high cooling system pressures, most coolants and non-oil based coolant additives. Caution: Do not use for fuel or oil transfer applications.
Good resistance to high temperatures for extended periods of time.
Easily recognized by its red cover.
Similar to SAE 20R3 Class D-2.
Temperature Range: -40°C to +125°C (-40°F to +257°F).