Weld-On Radiator Filler Neck 30mm Aluminum + 1.1 Bar Cap

Weld-On Radiator Filler Neck – 30mm | 1.1 Bar Cap | Aluminum Alloy

Upgrade your vehicle's cooling system with this high-performance Weld-On Radiator Filler Neck. Crafted from premium aluminum alloy and supplied with a 1.1 Bar radiator cap and overflow nozzle, this filler neck is engineered for durability, easy access, and wide vehicle compatibility — perfect for custom builds, restorations, and radiator upgrades.

Made in Mainland China.

Key Features

• Efficient Coolant Access: The 30mm (approx. 1.18 in) inner diameter opening makes coolant top-ups quick and mess-free, helping your engine maintain optimal operating temperature on every drive.
• Premium Aluminum Alloy Construction: Built to handle high temperatures and resist corrosion, delivering long-lasting dependable performance in demanding conditions.
• 1.1 Bar Pressurized Cap Included: The included radiator cap maintains proper system pressure for efficient heat management throughout the cooling circuit.
• Easy to Weld On: Designed for straightforward welding installation onto most radiator tanks, making it ideal for retrofit, repair, and upgrade projects.
• Wide Vehicle Compatibility: Fits most car radiator systems — an excellent solution for custom automotive builds and cooling system improvements.
• Enhanced Engine Protection: Ensures coolant levels remain consistent, supporting efficient thermal management and protecting engine components during operation.

Specifications

Package Contents

• 1 × Radiator Filler Neck
• 1 × 1.1 Bar Radiator Cap
• 1 × Overflow Nozzle

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Frequently Asked Questions

Q: What is the inner diameter of this radiator filler neck?

A: The fill neck has an inner diameter of approximately 30mm (1.18 inches), making it compatible with most standard radiator filler openings for retrofit and upgrade applications.

Q: Does this radiator filler neck come with a radiator cap?

A: Yes! Each package includes one aluminum alloy filler neck, one 1.1 Bar radiator cap, and one overflow nozzle — everything you need for a complete installation.

Q: Is this filler neck compatible with my vehicle?

A: This weld-on radiator filler neck is designed to fit most car radiator systems. It is ideal for custom builds, restorations, and upgrades where the 30mm inner diameter suits your radiator tank. Always verify dimensions before welding.

Q: What material is the filler neck made from?

A: It is constructed from premium aluminum alloy, which provides excellent resistance to high temperatures and corrosion for long-lasting, dependable performance in automotive cooling systems.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.