Weld-On Radiator Filler Neck 41 mm or 32 mm ID with Cap, Aluminium

Weld a proper filler neck onto a custom radiator, swirl pot or header tank. Comes with a radiator cap and an overflow outlet.

• 41 mm or 32 mm inside diameter
• Radiator cap included
• 1/16" NPT breather / overflow port
• Weld-on aluminium

Frequently asked questions

Which size filler neck do I need?
41 mm suits the common large radiator cap; 32 mm is for small caps. Match it to the cap you want.

Can it be welded to steel?
No, weld to aluminium only.

Quality and warranty

• Made in China from aluminium
• 2-year repair or replacement warranty against defects in materials and workmanship, on top of your rights under Australian Consumer Law
• Sold and backed by Tucks Performance, an Australian-owned business. Not sure what you need? Send us a message

Delivery: ships direct from our supplier partner, usually 10 to 20 days.