Best Fuel System Fittings of 2025

The EVIL ENERGY Quick-Disconnect Fitting is designed for optimal performance in your fuel system. Its 6AN thread size ensures a secure connection with a 3/8 inch and 5/16 inch inner diameter, making it versatile for various applications. The fitting features a 37-degree seal to prevent leaks, providing peace of mind while you drive. With a working pressure of 1500 psi and a wide temperature range from -40°F to 250°F, you can rely on it in extreme conditions. Made from durable aluminum alloy, this fitting combines strength with lightweight convenience, perfect for engine fuel rails and more.

The Ucreative Hose Fittings come as a set of two 6AN straight push lock hose fittings, perfect for those working with rubber fuel lines. The fittings feature a 6AN to 3/8 inch barb, ensuring a secure connection for your fuel system. Made from durable 6061-T6 aluminum alloy, these fittings can withstand high pressure up to 1500 PSI and a wide temperature range from -40°F to 248°F. Installation is straightforward, and using clamps can enhance the seal, providing you with peace of mind while ensuring a reliable fuel delivery system.

The Ucreative 6AN Coupler is designed for seamless fuel system connections. This package includes two male flare coupling adapters, allowing you to easily splice or extend fuel lines. With a thread size of 9/16-18 UNF, it is compatible with female thread fittings, ensuring versatility in your setup. It can handle extreme temperatures from -65 to +252 degrees Fahrenheit and withstands a maximum pressure of 1500 PSI, providing durability and reliability. Whether you’re connecting to a fuel filter or a pump, this coupler is a practical solution for enhancing your fuel system's efficiency.

The Gohantee EFI Fitting Adapter is designed for quick and efficient connections in your fuel system. It replaces the fuel inlet of EFI filters and fuel lines, making it a versatile choice for various applications, including engine oil rails and transmission coolers. Made from lightweight 6061-T6 billet aluminum, this adapter boasts enhanced durability due to its black anodized finish. With a sealing angle of 37 degrees and a high working pressure of 1500 psi, you can trust this fitting to perform reliably under various conditions. Plus, its precision machining ensures easy and accurate thread engagement.

Upgrade your engine fuel rail with the EVIL ENERGY Fuel Rail Fitting. This high-quality fitting is made of durable aluminum alloy and features a 6AN thread size, with a 3/8 inch and 5/16 inch spring lock. Thanks to its 37 degree angle seal, you can trust that this fitting will prevent any leakage. With a working pressure of 1500psi and a temperature range of -40°F to 176°F, this fitting is built to withstand tough conditions. Whether you're performing an LS swap or working on your transmission cooler, this fitting is versatile and can be used in various applications. Trust EVIL ENERGY for all your fuel system fitting needs.

The EVIL ENERGY Pressure Adapter is designed to enhance your fuel system by allowing you to easily add a fuel pressure gauge or sensor. It features a male AN6 to female -6 connection with a 1/8" NPT gauge port, ensuring compatibility with various setups. The sealing mechanism utilizes a 37-degree angle for the AN flare and a tapered design for the NPT, providing a reliable and leak-free connection. Made from durable 6061-T6 aluminum alloy, this adapter can withstand a maximum working pressure of 1500 PSI and temperatures ranging from -40°F to 250°F, making it suitable for a wide range of applications.

The Dorman Fuel Hose Fitting-Inverted Flare Male Connector comes in various styles, including tees, elbows and connectors, and is available in a range of sizes, assortments, and quantities to cater to both small and large projects. Made of corrosion-resistant brass, this fitting is durable and long-lasting. Additionally, every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team.

The EVIL ENERGY Fuel Fitting is designed for optimal performance in various automotive applications. With a thread size of 9/16-18UNF and an inner diameter of 3/8 inch, it fits seamlessly into your engine's fuel rail. The fitting features a 37-degree flare seal, ensuring that you won't experience any leaks during operation. It can handle a working pressure of up to 1500 psi and operates effectively in extreme temperatures ranging from -40°F to 250°F. Made from durable aluminum alloy 6061-T6, this fitting is built to last and is perfect for tasks like LS swaps and fuel sensor setups.

The GlowShift 1/2” Fuel Line T-Fitting Adapter is made of 304 stainless steel to prevent corrosion. It includes 1/2" (12.7mm I.D) barbed push lock fittings, 1/8-27 NPT port for fuel pressure gauge sensor, and two hose clamps. The adapter allows users to install a fuel pressure sensor to a 1/2" inner diameter fuel line. The product comes with step-by-step installation instructions.

The EVIL ENERGY Fuel Rail Adapter is designed for optimal performance in your fuel system. With a thread size of 9/16-18 UNF, it ensures a secure fit for various applications. The unique sealing mechanism features a 37-degree angle on the AN side and an O-ring on the ORB side, providing excellent leak prevention. Made from durable aluminum alloy 6061-T6 and NBR rubber, this adapter can handle pressures up to 1500 PSI and temperatures ranging from -65°F to 252°F, ensuring reliability under extreme conditions. This makes it an ideal choice for fuel rails, oil coolers, and more.