462-01 weld on radiator neck - small

Speedflow SF462-01 | Weld-On Radiator Neck | Small | Billet Alloy

The Speedflow SF462-01 is a precision-machined small billet alloy weld-on radiator neck, designed for custom radiator and header tank fabrication. Whether you're building a one-off custom radiator, fabricating a bespoke header tank, or upgrading an existing cooling system with a quality billet filler neck, the SF462-01 delivers a clean, professional result. Comes complete with a removable overflow tail for easy integration into your cooling system overflow setup.

Product Specifications

• Part Number: SF462-01
• Material: Billet aluminium alloy
• Size: Small
• Type: Weld-on radiator filler neck
• Includes: Removable overflow tail
• Barcode: 9342122008009

Applications

The SF462-01 is an essential component for custom cooling system fabrication, including:

• Custom aluminium radiator fabrication requiring a billet filler neck
• Header tank and expansion tank fabrication for performance and race vehicles
• Replacement of damaged or corroded OEM radiator necks on custom-built radiators
• Hot rod, street rod, and race car cooling system builds
• Any custom cooling system requiring a weld-on billet alloy radiator filler neck

Why Billet Alloy?

Billet aluminium offers superior strength, corrosion resistance, and heat tolerance compared to cast or pressed alternatives — critical qualities in a radiator neck that must withstand constant heat cycling, pressure, and vibration. The machined finish provides a precise, consistent fit for radiator caps and delivers a premium aesthetic that complements quality custom fabrication work. The removable overflow tail allows flexible routing of the overflow hose to suit your specific build layout.

Sold individually. Weld-on fitment — requires TIG or MIG welding to aluminium radiator or header tank. Includes removable overflow tail.