Dayco 72303 Curved Radiator Coolant Hose

The Dayco 72303 is a factory-molded, curved radiator coolant hose engineered for OE-quality performance in modern engine compartments. This lower radiator hose connects the coolant pipe to the radiator, providing a critical cooling system component designed for long-lasting durability and reliable performance.

Key Features:

• 1-5/16 inch inside diameter on both ends for secure fitment
• 15-inch trunk height curved design for tight engine bay installations
• All-synthetic EPDM rubber construction with knitted reinforcement for maximum strength
• Engineered to resist electrochemical degradation, the leading cause of hose failure
• Heat- and ozone-resistant materials for extended service life
• Complies with SAE 20R3 Type EC Class D-1 and D-2 specifications
• Temperature range of -40°F to 257°F
• Black finish

This precision-molded hose provides superior resistance to oil, mud, salt, road debris, ozone, coolants, and extreme temperature variations. The inner base tube features knitted rayon reinforcement for exceptional burst resistance throughout the life of the hose. Cross-references include NAPA 16019, Gates 23281, ACDelco 22593M, Goodyear 66181, and Nissan OEM 21503-7S000.