Lower Radiator Hose 1-3/4 x 16-1/2

The ALLSTAR PERFORMANCE Lower Radiator Hose 1-3/4 x 16-1/2 is a critical engine cooling system component designed for street rods, classic vehicles, and custom high-performance builds where factory radiator configurations don't fit modern engine transplants or aftermarket cooling setups. This hose serves as the return line from the radiator back to the engine water pump, handling low-pressure coolant flow in a recirculation circuit that maintains engine operating temperature within optimal parameters.

Constructed from durable, heat-resistant rubber compound, the Lower Radiator Hose 1-3/4 x 16-1/2 features a 1.75-inch inner diameter (ID) with a total length of 16.5 inches, providing adequate reach for engine bays where standard OEM hose lengths create fitment conflicts. The black rubber construction resists degradation from coolant chemistry, oil exposure, and UV light—critical factors in open-engine bay environments common in restoration and performance builds. At 0.83 lbs, the hose is lightweight yet engineered with wall thickness sufficient to prevent collapse under vacuum conditions created during engine shutdown cycles.

Fabricators, engine builders, and restoration specialists rely on the ALLSTAR PERFORMANCE Lower Radiator Hose 1-3/4 x 16-1/2 for custom cooling system layouts where precision hose routing eliminates stress on radiator fittings and water pump connections. This configuration is particularly valuable in tight engine compartments and non-traditional mounting arrangements where pre-bent OEM hoses cannot accommodate the installation geometry. Verify inlet and outlet fitting diameters before purchase to ensure compatibility with your specific radiator and water pump combination; standard hose clamps or spring clamps secure the connection points.