Dayco 72121 Curved Radiator Coolant Hose

The Dayco 72121 is a curved molded radiator hose engineered as a direct OE replacement for light-duty vehicle cooling systems. Designed to meet or exceed original equipment specifications, this hose delivers a precise fit and reliable, long-lasting performance in the cooling system.

Key Features:

• Synthetic EPDM (ethylene propylene diene monomer) rubber construction for superior resistance to oil, salt, ozone, coolants, and coolant additives
• Knitted rayon reinforced inner base tube for maximum burst strength and collapse resistance throughout the life of the hose
• Meets SAE J20R4, Class D-1 requirements for molded radiator hose applications
• Also meets SAE J1684 Type EC electro-chemical requirements, preventing inner tube deterioration caused by static electric charge buildup
• Withstands temperature extremes from -40°F (-40°C) to +257°F (+125°C)
• Protective outer sleeve resists abrasion, mud, road debris, and other harsh environmental elements
• Pre-molded curved shape ensures proper routing and an unrestricted coolant flow path
• Leak-proof construction for dependable, long-term service life

The Dayco 72121 curved radiator hose is part of Dayco's comprehensive aftermarket coolant hose line, backed by decades of OE-level engineering expertise. It is a straightforward drop-in replacement that restores cooling system integrity without modification.