Inline Radiator Hose Filler Neck, Radiator Coolant Hose Filler Neck with 16PSI Cap, 32mm 1‑1/4in OD T6061 Aluminum Polished Surface for Cars, Easy Coolant Refill Inline Pipe Filler

Easy Coolant Refill: This inline radiator hose filler neck features a convenient top-fill design that allows quick and mess-free addition of coolant without removing hoses or disassembling parts. The integrated 16PSI pressure cap ensures safe system pressurization while the polished T6061 aluminum construction resists , making this radiator filler neck ideal for maintaining optimal engine temperature during daily driving or track use.

Durable Aluminum Build: Crafted from high-strength T6061 aluminum with a mirror-polished surface, this radiator coolant hose filler neck offers excellent resistance to heat, pressure, and rust. Unlike plastic alternatives that crack over time, this metal inline radiator pipe filler neck delivers long-lasting reliability under demanding under-hood conditions, ensuring your cooling system stays sealed and efficient for years.

Universal Car Compatibility: Designed to weld directly onto a 32mm (1‑1/4in OD) coolant hose, this radiator filler neck fits most custom or modified radiator setups in sedans, trucks, muscle cars, and race vehicles. Whether you're building a show car, restoring a classic, or upgrading your cooling system, this inline radiator hose filler neck provides a clean, functional solution for easy coolant access across a wide range of automotive applications.

Precision Engineering: The inline radiator hose filler neck is machined to exact tolerances with a 110mm-long neck welded to a 32mm tube, ensuring a secure fit and smooth coolant flow. Its seamless design minimizes turbulence in the cooling circuit, helping maintain consistent engine temperatures. The polished finish not only enhances under-hood aesthetics but also simplifies cleaning and inspection during routine maintenance.

Complete Ready-to-Install Kit: Each package includes one inline radiator hose filler neck with a pre-installed 16PSI radiator cap, so you have everything needed for installation right out of the box. While professional welding is recommended for proper integration into your coolant line, this radiator filler neck with cap saves time and eliminates the need for additional fittings, offering a streamlined upgrade for any performance or custom cooling system.