Quick Connect Hose Fittings

Shop Evil Energy quick disconnect fittings for EFI fuel lines, OEM hard lines, fuel rails and LS swap plumbing. These fuel line fittings connect compatible factory-style SAE ports to AN flare, ORB or NPT plumbing, helping retain a usable factory connection and making later fuel-system service more direct. Choose an individual fuel rail adapter or a 6AN LS/EFI fitting kit to match the scope of your build.

How to Choose the Right Quick Disconnect Fuel Line Fitting

Start with the mating SAE end, not the vehicle badge. Measure the outside diameter of the male tube or verify the component specification: 5/16 inch equals 0.3125 inch, 3/8 inch equals 0.375 inch, and 1/2 inch equals 0.500 inch. Then confirm the other connection, including 6AN or 8AN flare, AN6/AN8/AN10 ORB, or the listed NPT size; check male/female direction and choose straight or 90 degree routing. SAE tube size and AN dash size describe different interfaces, so never assume a 3/8 inch quick connect is automatically the fitting your 6AN line requires. For the rest of the route, compare fuel line fittings and PTFE fuel line kits.

Best Uses for EFI Fuel Rail Adapters

  • EFI and LS swap connections: Join a supported factory fuel rail, feed or return connection to the AN plumbing selected for the build.
  • Service-friendly routing: A properly matched SAE quick disconnect can simplify access to a rail, filter, pump or sensor during future maintenance.
  • Tight engine bays: Choose a 90 degree adapter only when it improves clearance and avoids hose kink or side load; use a straight adapter when the route is already aligned.
  • Before you order: Verify both interface types, tube OD, connection gender, angle, pack quantity and fuel compatibility for the selected SKU. After installing quick disconnect fittings, confirm the retainer is locked, perform a gentle tug test, pressurize the system and inspect for leaks before operation. Planning a complete conversion? Browse LS swap fuel system kits.

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EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY[Straight,1PC]
EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black

Engineered for high-pressure, high-temperature fuel systems, the EVIL ENERGY PTFE Hose End Fitting delivers leak-proof performance for PTFE fuel lines in performance builds, LS swaps, boosted engines, and ethanol-based fuel setups. Made from 6061-T6 aluminum with a 360° swivel design, these AN fittings ensure a clean, secure, and easy-to-assemble connection—ideal for builders who demand durability and precision.

$8.99
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[Black,Without Bracket] black inline evil energy fuel filter with directional arrow and multiple AN fuel line fittingsevil energy fuel filter kit with stainless steel inline fuel filter, AN fittings, and mounting hardware
EVIL ENERGY Inline Fuel Filter with 6AN 8AN 10AN Adapter and Bracket Universal 10/30/40/100 Micron - Black

[Application] Universal fuel filter, includes an6, an8, an10 adapters for different size applications. With mounting bracket keeps the engine bar stylish and clean.

  • [Material] Aluminum alloy fuel filter can and stainless steel filter element.
  • [O-ring] The o-ring provides a tight seal for fittings and end caps.
  • [Function] Can be used for filtering gasoline, diesel, etc. Captures contaminant particles of 10 micron and above to protect the fuel system of the vehicle.
  • [Feature] Removable design, easy to clean or replace filter element at regular time.
  • [Installation Tips] We have debugged the installation direction of the fuel filters before delivery. Please check and ensure the closed end of the filter element docks with the spring. Let the liquid flow following the arrow from the spring end to the other end, and the fuel filter will serve longer.
$23.99
$23.99
$24.99
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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

$62.09
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[1 PC][2 PCS]
EVIL ENERGY AN Flare to AN ORB Male Fuel Rail Adapter Fitting
  • AN to ORB Conversion
    Converts AN flare fittings to ORB ports for fuel rails and aftermarket fuel components.
  • High Pressure Capability
    Rated up to 1500 PSI for reliable performance in fuel and oil systems.
  • Leak Free Sealing Design
    37 degree AN flare seal combined with ORB O ring ensures a secure, leak resistant connection.
  • CNC Machined Aluminum
    Made from 6061 T6 aluminum with black anodized finish for corrosion resistance.
  • Wide Size Availability
    Multiple AN sizes available to support custom fuel system layouts.
$8.99
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  • [Straight,1PC][90 Degree,1PC]
    EVIL ENERGY 6/8AN Male to SAE Quick-Disconnect Fittings Female Push-On EFI Ls Swap Fitting

    Upgrade your fuel system with confidence! EVIL ENERGY’s 6/8AN to SAE Quick-Disconnect Fittings provide a leak-proof, high-pressure connection for EFI LS swaps, engine fuel rails, transmission coolers, return lines, and fuel sensors. Constructed from durable 6061-T6 aluminum with precision sealing, these fittings simplify installation while ensuring maximum reliability under extreme temperatures and pressures. Perfect for professional tuners and DIY engine enthusiasts looking for a seamless fuel system upgrade.

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  • [1PC][2PCS]
    EVIL ENERGY 6AN to 5/16 & 3/8 inch EFI Quick-Disconnect Fuel Rail Fitting – Aluminum LS Swap Adapter
    • Purpose-Built for EFI & LS Swaps – Converts 6AN fuel lines to factory-style 5/16" or 3/8" EFI quick-disconnect fuel rails.
    • Leak-Free 37° AN Seal – Precision flare sealing eliminates fuel seepage under high pressure.
    • High-Pressure Ready – Rated up to 1500 PSI for modern EFI and performance fuel systems.
    • OEM-Style Push-On Connection – Quick-disconnect female end saves install time and ensures secure engagement.
    • Durable Aluminum Construction – CNC-machined 6061-T6 aluminum for corrosion resistance and long service life.
    $12.09
    $12.09
    $15.99
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  • [Straight,1PC][90 Degree]
    EVIL ENERGY 6/8AN Male to SAE Quick-Disconnect Male Push-On EFI Ls Swap Fitting Adapter
    ---!@!start!@!---Specifications---!@!end!@!--- Size 6AN to 3/8 ,6AN to 5/16，8AN to 3/8 ,8AN to 5/16， Material Aluminum Brand EVIL ENERGY Color Black-long rod Connector Type Adapter Exterior Aluminum Thread Type EPA ---!@!start!@!---Description---!@!end!@!--- [Size] The thread size of 6an is 9/16-18UNF, 8an is 3/4-16 UNF. The OD...
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  • EVIL ENERGY 6AN Male to SAE Quick-Disconnect Female 90 Degree Push-On EFI Ls Swap Fitting - EVILENERGYEvilenergy EVIL ENERGY 6AN Male to 3/8" or 5/16" SAE Quick-Disconnect Female 90 Degree Push-On EFI Fitting[6AN to 3/8 inch]
    EVIL ENERGY 6AN Male to SAE Quick-Disconnect Female 90 Degree Push-On EFI Ls Swap Fitting
    Product details Size 6AN to 3/8,6AN to 5/16 Material Aluminum Brand EVIL ENERGY Color Blackblue-90 degree Connector Type Flare Thread Size 3/8",5/16" Exterior Aluminum Thread Type NPT Number of Pieces 1 About this item [Size] The thread size of 6an is 9/16-18UNF. The ID...
    $14.99
    $14.99
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  • EVIL ENERGY 6/8AN Female to SAE Quick Disconnect EFI Ls Swap Fitting Adapter, Black Aluminum - EVILENERGY[6AN to 3/8 inch]
    EVIL ENERGY 6/8AN Female to SAE Quick Disconnect EFI Ls Swap Fitting Adapter, Black Aluminum
    • Converts AN6 or AN8 female thread to 5/16" or 3/8" SAE quick disconnect EFI fitting.
    • Machined from 6061-T6 aluminum, black anodized for durability and corrosion resistance.
    • 37° AN flare design ensures tight seal, no leaks up to 1500 PSI.
    • Operating range: -40℉ to 250℉ – suitable for high-temp, high-pressure EFI systems.
    • deal for LS swap fuel rails, return lines, sensor ports, and transmission coolers.
    $12.29
    $12.29
    $12.29
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  • EVIL ENERGY 6AN LS Swap EFI Fitting Kit – PTFE Hose Ends, Quick Connect & NPT AdaptersEVIL ENERGY 6AN LS Swap EFI Fitting Kit – PTFE Hose Ends, Quick Connect & NPT Adapters
    EVIL ENERGY 6AN LS Swap EFI Fitting Kit – PTFE Hose Ends, Quick Connect & NPT Adapters
    • LS Swap EFI Specific Kit
      Designed for GM LS EFI fuel system conversions.
    • Complete 6AN PTFE Hose Ends
      Straight, 45°, 90°, and 180° fittings included.
    • Quick Connect Ready
      Adapters for GM 3/8" & 5/16" fuel rail connections.
    • NPT Integration Support
      Easily connects pumps, filters, and regulators.
    • Reusable CNC Aluminum Fittings
      Built for PTFE hose and high-pressure EFI systems.
    $64.99
    $64.99
  • [Straight][90 Degree]
    EVIL ENERGY AN6/8/10 ORB Male to 3/8-inch/1/2-inch/5/16-inch SAE Quick-Disconnect Male Push On EFI Fuel Rail Fitting Adapter Aluminum
    • Direct OEM Swap Ready: Male SAE quick-disconnect end mates with GM/Ford factory-style push-on fuel line couplers — no crimping, no tools.
    • Sealed Bulletproof: ORB side uses a Viton-grade O-ring, tested to 1500 PSI, -63°F to 252°F — safe for gas, diesel, methanol and E85. 
    • Aircraft-Grade Build: CNC-machined 6061-T6 aluminum with anodized black finish, corrosion-resistant. 
    • Two Angles, Nine Sizes: Straight or 90° in AN6/8/10 to 5/16", 3/8" or 1/2" SAE — plumb tight engine bays without kinking your PTFE fuel line.
    $13.99
    $13.99
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  • [3/8 NPT to 3/8" SAE][1/4 NPT to 5/16" SAE]
    EVIL ENERGY Quick Disconnect Male Push On EFI Fitting Adapter Aluminum(NPT Male to SAE)
    Brand EVIL ENERGY Connector Type Quick-Connect Material Aluminum Color Black
    $13.99
    $13.99
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FAQs about Quick Connect Hose Fittings

What size quick disconnect fitting do I need for an EFI fuel rail: 5/16, 3/8 or 1/2 inch?

Measure the outside diameter of the male SAE tube with a caliper, or confirm the port specification from the component manufacturer. A 5/16 inch tube measures 0.3125 inch, a 3/8 inch tube measures 0.375 inch, and a 1/2 inch tube measures 0.500 inch. Select the same SAE quick connect size, then separately verify the AN, ORB or NPT side and its male/female direction. Do not order by vehicle model alone because a previously changed fuel rail, tank module, filter or fuel line can alter the required connection.

No. SAE quick disconnect fuel line fittings, AN 37 degree flare, ORB, NPT and similar-looking vehicle-specific spring-lock connectors use different mating and sealing methods. A connector that looks close may fail to engage or seal correctly. Before ordering, verify the interface type, nominal size, male/female direction and required angle on both sides. Evil Energy offers several interface combinations, but each variant is intended for the exact pairing shown in its option name.

Match the fuel rail adapter to the AN size already used by the fuel hose, hose ends and connected components. A 6AN adapter belongs with compatible 6AN plumbing, while an 8AN adapter belongs with compatible 8AN plumbing; the adapter alone does not determine the flow requirement of the complete fuel system. Choose straight when the hose route is aligned and has adequate clearance. Choose 90 degree when it creates a cleaner route and helps avoid hose kinking or side load in a tight engine bay.

Many EFI quick connect fittings install by pushing the correctly sized parts together until the retainer engages, but removal may require a compatible disconnect tool depending on the female connector and retainer design. Depressurize the fuel system first, clean the mating tube, inspect the O-ring and retainer, and apply only the lubricant specified for that connector. Push the fitting on straight, confirm the click or lock, and perform a gentle tug test. Do not force an adapter that does not seat fully.

Start with the exact interface and size. Inspect the O-ring, sealing surface and retainer for cuts, dirt, corrosion or deformation; replace damaged service parts or the fitting before use. Install the connector without side load, confirm full retainer engagement, and perform a gentle tug test. Then pressurize the fuel system and inspect the connection for seepage before starting the vehicle and again after the initial operating cycle. A fitting that does not lock positively or continues to leak should not remain in service.

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