Dayco 72300 Upper Radiator Coolant Hose

The Dayco 72300 is a precision-molded upper radiator hose engineered to deliver reliable cooling system performance. This OE-style replacement hose is constructed from synthetic EPDM rubber compounds that provide exceptional resistance to deterioration from ozone, coolants, and temperature extremes ranging from -40°F to +257°F.

Key Features:

• Single I.D. hose design with 1-13/16 inch inside diameter at both ends
• Knitted rayon reinforcement in the inner base tube for maximum strength and burst resistance
• Black EPDM rubber construction resists oil, mud, salt, road debris, and ozone
• Meets SAE J20R4 Class D-1 requirements for improved service hose performance
• Meets SAE J1684 Type EC electro-chemical requirements to prevent premature deterioration from static electric charge buildup
• Trunk height of 13.5 inches for precise OE fitment

Designed for long-lasting durability, this molded radiator hose maintains its shape and integrity throughout its service life without flattening or collapsing. The advanced EPDM formulation ensures compatibility with modern coolant formulations while delivering superior flexibility and performance in demanding engine bay environments.