Stainless Steel Radiator Filler Necks

Constructed from durable grade 304 stainless steel, these Radiator Filler Necks are perfect for custom builds or repairs. Choose from three sizes: small Japanese, standard, or large commercial. 

These filler necks offer a versatile solution for your radiator needs. With options for both welding and soldering, they are ideal for use with stainless expansion tanks. Enjoy long-lasting, secure connections with these high-quality filler necks.

All our radiator filler necks are designed for easy self-welding installation. 

Standard 56 mm neck overflow is loose and will need welding before welding to tank