Radiator Hose Filler 1.5in Hose To 1.5in Hose

The MOROSO Radiator Hose Filler 1.5in Hose To 1.5in Hose (Part #63730) is a precision aluminum filler neck designed for direct hose-mount cooling system integration. This component bridges radiator inlet ports to upper radiator hoses with a 1.5-inch bore diameter on both connections, maintaining OEM-spec flow rates while providing a clean, leak-resistant junction point essential for custom cooling system builds and high-performance engine swaps.

Constructed from aircraft-grade aluminum in natural (mill) finish, this filler neck offers excellent thermal conductivity and corrosion resistance in standard automotive coolant environments. The dual 1.5-inch hose ports accommodate standard aftermarket radiator hoses, eliminating adapter stacking and reducing turbulence at the filler transition. The compact 3.45 x 3.35 x 5.85-inch profile fits tight engine bay configurations common in street rods, restorations, and performance builds. At 0.44 lbs, it adds minimal weight while delivering structural rigidity at high coolant flow rates.

This filler neck is purpose-built for fabricators, engine builders, and enthusiasts assembling custom cooling systems where OEM fill caps and factory inlet configurations are incompatible with modernized radiators or alternative hose routing. It serves as a direct replacement or upgrade component in street rod restorations, LS or big-block swaps, and vintage vehicle re-cooling projects where standardized hose-to-hose connections streamline assembly and reduce future leak points. MOROSO's engineering ensures compatibility with industry-standard 1.5-inch radiator hose clamps and barbed hose connectors.