Best Aluminum Fuel Tank Filler Necks of 2025

The Camoo Fuel Filler Neck is designed for custom applications, specifically for 2" fuel filler neck hoses. This setup is great for vehicles like dune buggies and hot rods, allowing you to mount the filler cap outside the cabin. This keeps harmful fuel odors and fumes away from your driving space. The kit includes a steel weld-on mount plate, ensuring a secure installation. With high-quality materials, including a billet aluminum cap, this product promises durability and longevity, making it a reliable choice for your fuel system needs.

The BAGARAATAN Weld Billet Filler Neck Cap is a versatile and convenient accessory for your oil, fuel, or water tanks. This complete replacement cap is machined from 6061-T6 aluminum alloy, with a polished surface and a clear anodized finish for shine and durability. It comes with a pressure cap and includes a seal O-ring for a secure fit. The weld-on filler neck and cap are designed to fit OEM coolant tanks with a threaded fill neck. The scalloped design adds a stylish touch to any engine bay. With different cap OD sizes available, you can choose the perfect fit for your needs. Upgrade your tank with the BAGARAATAN Weld Billet Filler Neck Cap for a sleek and functional addition.

This 2-inch fuel tank cap is suitable for welding on a 2-inch inner diameter pipe interface, and is made of high-quality aluminum alloy materials that are firm, anti-rust, and durable. The cap is easy to install, and precision-machined to exact tolerances for trouble-free performance. Its cap diameter is about 58mm, cap height is about 15.5mm, overall height is about 81mm, bore is about 47mm, neck outer diameter is 2in, neck thread and cap thread are M52x2.5.

The YIGUCS Fuel Tank Cap is designed for replacing damaged or leaking fuel tank caps on coolant tanks. This product is compatible with models that have a threaded filler neck, ensuring a secure fit. Made from high-quality aluminum alloy, it offers durability and resistance to wear and corrosion, extending its lifespan. The polished surface not only enhances its appearance but also provides a pressure cap, making it a practical addition to your engine compartment. With a scalloped design and a clear anodized finish, this cap adds both style and functionality to your vehicle.

The HARIFOGER Aluminum Fuel Cap is designed for versatility in various tank applications, including oil, fuel, and water. Made from durable aluminum alloy, it ensures longevity and resistance to wear. The included O-Ring provides a secure seal, preventing leaks and ensuring that your tank remains airtight. This product is compliant with aviation hose coupling standards, making it a reliable choice for your fuel needs. The package comes with a silver flange cap and seal O-Ring, giving you everything you need for installation and use.

The Sunluway Fuel Filler Kit is designed to enhance your vehicle's fuel filling experience. Its custom fit works with a 2-inch filler neck hose, making it versatile for various vehicles. You will appreciate the convenience of having the filler cap mounted externally, allowing easy access to your fuel tank, especially in tight or difficult areas. Made from durable billet aluminum, this kit resists corrosion and holds up well under regular use. The included high-strength steel bracket is perfect for welding, ensuring a secure fit for your custom fuel systems.

The HARIFOGER Fuel Cap is made from durable aluminum alloy, ensuring long-lasting performance for your fuel, oil, or water tanks. It features a secure weld on the neck and cap, making it ideal for a variety of applications including oil and fuel storage. The included O-Ring provides a tight seal, preventing leaks and ensuring compliance with aviation hose coupling standards. Each package comes with a silver fuel tank cap, a silver flange cap, and a seal O-Ring, giving you everything you need for a reliable connection. With a bore size of 38.1mm, it's essential to check compatibility with your specific needs.

The Sunluway Remote Fuel Filler offers a custom fit for a 2-inch fuel filler neck hose, making it ideal for enhancing your vehicle's fuel system. It simplifies the refueling process by allowing you to mount the filler cap outside your vehicle, which is especially helpful in tight or difficult spaces. Crafted from high-quality billet aluminum, this filler neck is built to resist corrosion and endure regular use. The included high-strength steel bracket is designed for welding, ensuring a secure installation for your custom fuel systems in various vehicles.

The Zreneyfex Cap is designed to enhance your engine bay with its stylish scalloped design, providing both aesthetics and function. Available in various sizes, you can choose the perfect fit for your needs. Made from durable 6061-T6 aluminum alloy, this cap ensures longevity and reliability. Its polished surface not only adds a sleek look but also resists wear and tear. Additionally, it is specifically crafted to fit OEM coolant tanks, making installation straightforward and hassle-free for users.

The HARIFOGER Fuel Cap is designed for versatility, perfect for oil, fuel, and water tanks. Made from durable aluminum alloy, it ensures long-lasting use. The included O-Ring enhances the seal, preventing leaks and making it compliant with aviation hose coupling requirements. This means you can trust it for safe fuel storage. With a bore size of 25.4mm and a neck thread size of M36 x 2, it’s essential to check compatibility with your setup. The package includes everything you need for easy installation, making it a convenient choice for any user.