AN to AN Fittings

High-Performance EVIL ENERGY AN Fittings

The Evil Energy fitting series is engineered for high-performance automotive fuel, oil, and cooling systems. Whether you are building a professional racing rig or a clean street machine, choosing the right an fitting is critical for safety and efficiency. Manufactured from premium 6061-T6 aluminum with a durable black anodized finish, these evil energy fittings are designed for exceptional strength, corrosion resistance, and a long service life. With a precise 37° flare sealing structure and a flexible 360° swivel design, every evil energy an fittings product allows for quick installation, precise alignment, and a leak-free connection under extreme racing conditions.

Versatile Solutions: AN Hose Fitting & Adapters

The comprehensive Evil Energy an fittings collection includes a wide variety of angles: straight, 45°, 90°, and 180° an hose fitting ends. To ensure full system compatibility, we offer specialized an fitting adapters, unions, and couplers, covering standard sizes from 3AN up to 16AN. These an fittings are widely compatible with CPE and nylon braided hoses, making them the go-to choice for multiple applications—such as high-pressure fuel delivery, oil lines, transmission coolers, and turbo setups. Specifically, for those upgrading their delivery system, our evil energy fuel pump fittings provide the necessary transition from pump to rail with zero pressure drop.

Engineered for Reliability: The AN Fitting Standard

Every evil energy fitting delivers strong sealing and smooth internal flow paths, ensuring stable performance for both daily driving and E85 conversions. By using high-grade an fitting adapters, builders can seamlessly bridge different thread types without risking leaks. The an hose fitting design features a secure grip that prevents hose blow-off even under high vibration. When reliability is non-negotiable, evil energy an fittings provide the peace of mind needed on the track.

Technical Specifications & Comparison

Feature EVIL ENERGY AN Fitting Specifications
Product Material Aircraft-Grade 6061-T6 Aluminum
Surface Finish Anti-Corrosion Black Anodized
Compatible Hoses Nylon Braided, Stainless Steel Braided, CPE
Pressure Rating Tested up to 1500 PSI
Temperature Range -65°F to 252°F
Seal Type Leak-Free 37° Flare Seal
Available Adapters an fitting adapters (NPT, Metric, ORB)

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Ultimate Guide: EVIL ENERGY AN Fittings

When it comes to high-performance plumbing, the evil energy an fittings series stands as the industry benchmark for reliability. Whether you are plumbing a custom turbo setup or upgrading your fuel system, using a high-quality an fitting ensures a leak-free seal under extreme pressure. Every evil energy fitting is precision-machined from 6061-T6 aluminum to meet rigorous racing standards. Our collection of an fittings and an fitting adapters provides the versatility needed for complex routing, while the specialized an hose fitting design offers superior grip for braided lines. From street builds to professional motorsport, evil energy fittings deliver the 'set it and forget it' confidence every builder craves.

The term an fitting stands for 'Army-Navy,' a standard originally developed by the U.S. military during World War II to ensure compatibility and reliability in aircraft fluid systems. Today, this standard governs the 37° flare sealing surface used in almost all an fittings. When you choose an evil energy an fittings product, you are utilizing this flight-proven geometry. Unlike standard NPT or pipe threads, an evil energy fitting creates a mechanical seal that doesn't require Teflon tape, making it the preferred an hose fitting for fuel, oil, and coolant applications where failure is not an option.

Determining the size of your an fittings is straightforward once you understand the 'Dash' system. AN sizes are based on the outside diameter (OD) of the hard tubing in increments of 1/16 inch. For example:

-6AN equals 6/16-inch, which is 3/8-inch.
-8AN equals 8/16-inch, which is 1/2-inch.
-10AN equals 10/16-inch, which is 5/8-inch.

To identify an unknown an hose fitting, measure the male thread diameter. A -6 an fitting will have a thread diameter of approximately 9/16-inch-18 UNF. If you are adapting different systems, using evil energy an fittings in conjunction with our precise an fitting adapters ensures you can jump between sizes without compromising flow. Always verify your thread pitch before installing any evil energy fittings.

Performance enthusiasts worldwide trust evil energy an fittings because we prioritize real-world testing over marketing hype. Each evil energy fitting is tested to withstand up to 1500 PSI, making them ideal for high-pressure evil energy fuel pump fittings applications. Our an fitting adapters feature a deep anodized finish that resists the corrosive effects of E85 and exotic racing fuels. Furthermore, the 360° swivel design on our an hose fitting range allows for easy alignment in tight engine bays—a feature highly praised by YouTube DIYers and professional builders alike. When you invest in evil energy fittings, you are getting 'race-ready' quality at an accessible price point, backed by a global community of automotive experts.

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Featured Products

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.

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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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  • Silver Black
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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.

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[20FT] EVIL ENERGY PTFE Fuel Hose Kit, complete black braided hose & fittings set[10FT] EVIL ENERGY PTFE Fuel Hose Kit, complete black braided hose & fittings set
EVIL ENERGY 6AN 3/8-inch PTFE LS Swap EFI Fuel Line Fitting Kit | E85 Nylon Braided Fuel Hose With Fittings 10-26FT
  • Parameter: Working temperature range: -76℉ to 446℉ (-60℃ to 230℃). Maximum working pressure: 1,500 PSI. Bursting pressure: 4,500 PSI.
  • Applicable Medium: EVIL fuel line kits are suitable for all automotive fuels, lubricants, and coolants.
  • Suitable for Wide Usage: The PTFE nylon braided fuel line is ideal for use in various high-temperature and high-pressure applications.
  • Notice: The PTFE hose is relatively hard and can't be bent or folded in half. Professional installation is highly recommended.

PTFE nylon braided fuel line kit offers superior durability for high-pressure and high-temperature applications, making it perfect for EFI systems, turbo setups, and all automotive fuels.

$76.99
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  • [4AN,4AN,1PC][3AN,4AN,1PC]
    EVIL ENERGY AN Male to AN Male Flare Coupler Union Straight Fuel Hose Adapter Fitting Black

    $6.99
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  • [1PC][2PCS]
    EVIL ENERGY AN Female to AN Male Flare AN Reducer Adapter
    Product details Size AN10-AN6/8 AN8-AN6 AN6-AN4 Brand EVIL ENERGY Color black Connector Type Reducer Exterior Aluminum Thread Type UNF Number of Pieces 1PC or 2PCS About this item Size: Female AN10 to Male AN6/8, Female AN8 to Male AN6,Female AN6 to Male AN4,the thread...
    $8.59
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  • [1 PC][2 PCS]
    EVIL ENERGY AN Female to Male Flare 45/90 Degree Fitting Swivel Aluminium (3/4/6/8/10/12AN)
    • AN female to AN male flare adapter, compatible with 3AN/4AN/6AN/8AN/10AN/12AN applications.
    • Made from high-strength 6061-T6 aluminum alloy with black anodized finish for durability.
    • 37° flare sealing design ensures a reliable, leak-free connection.
    • 360° swivel construction allows quick, hassle-free installation.
    • Withstands up to 1500 PSI working pressure and -65℉ to 252℉ temperature range.
    $10.08
    $10.08
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  • [Straight,1PC][Straight,2PCS]
    EVIL ENERGY 3/4/6/8/10/12AN Female to Female Swivel AN Union Fitting Aluminum

    The EVIL ENERGY Female-to-Female AN Union Fitting is a compact and reliable solution for connecting two AN male hose ends. CNC-machined from 6061-T6 aluminum and anodized in black, this straight-through adapter supports 360° swivel, 1500 PSI working pressure, and a precise 37° flare seal. Ideal for EFI conversions, LS swaps, or any high-pressure fluid system where modular plumbing and clean routing are key.

    $9.49
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  • [1PC][2PCS]
    EVIL ENERGY AN Female to AN Male Falre Reducer Expander Adapter Fitting（3/4/6/8/10/12AN）

    EVIL ENERGY AN Flare Reducer & Expander Adapters provide the perfect solution for transitioning between AN line sizes during fuel system upgrades or engine swaps. Made from durable 6061-T6 aluminum and black anodized for corrosion resistance, these fittings support up to 1500 PSI and are designed with a precision 37° flare seal. Compatible with fuel, oil, and coolant systems—ideal for LS swaps, EFI builds, and custom plumbing setups.

    $9.99
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  • [1 PC][2 PCS]
    EVIL ENERGY 4/6/8/10/12AN Female to Female 90 Degree Swivel Coupler Union Fitting Adapter Aluminum
    • Universal AN Fitment: Available in 4AN, 6AN, 8AN, 10AN, and 12AN sizes with precise UNF thread for secure connections.
    • High-Performance Design: 90° swivel coupler ensures smooth fuel line routing in tight engine bays.
    • Durable Construction: CNC-machined from 6061-T6 aluminum with a corrosion-resistant black anodized finish.
    • Reliable Sealing: 37° flare angle guarantees leak-free operation under extreme pressure.
    • Track & Street Proven: Rated up to 1500 PSI and -65℉ to 252℉, suitable for fuel, oil, coolant, and more.
    $11.29
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  • [Straight][45 degree]
    EVIL ENERGY AN Female to AN Female Swivel Coupler Union Fitting Adapter Aluminum (3/4/6/8/10/12/16AN)
      Size 3/4/6/8/10/12/16AN Material Aluminum Brand EVIL ENERGY Angel Straight 45/90/180 degree Connector Type Union   About this item Parameter: Max Working Pressure: 1500PSI. Working Temperature Range: -40℉ to 250℉. Sealing: The AN side of the flare is sealed by a 37 degree angle....
    $9.49
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  • [10PCS][12PCS]
    EVIL ENERGY 6/8/10AN Hose End Fitting Kit with AN Male to Male Coupler & AN Hose Separator Clamp for PTFE Fuel Hose
    • Complete PTFE Plumbing Kit – Includes 6AN/8AN/10AN swivel hose ends, AN male-to-male coupler, and hose separator clamps for a full fuel/oil system upgrade.
    • Leak-Proof 37° Flare Seal – Delivers a secure, high-pressure connection superior to rubber hose clamps or push-lock fittings.
    • High-Performance Build – CNC-machined 6061-T6 aluminum, black anodized coating, and up to 1500 PSI capability for racing-grade reliability.
    • Perfect for Tight Engine Bays – Straight/45°/90°/180° configurations simplify routing in complex layouts and boosted setups.
    • E85-Ready & Temperature-Resistant – Works from -65°F to 252°F, ideal for fuel, oil, and transmission line upgrades.
    $62.72
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  • EVIL ENERGY AN Female to AN Female 90 Degree Low Profile Swivel Coupler Union Fitting Adapter Aluminum - EVILENERGYEVIL ENERGY AN Female to AN Female 90 Degree Low Profile Swivel Coupler Union Fitting Adapter Aluminum - EVILENERGY
    EVIL ENERGY AN Female to AN Female 90 Degree Low Profile Swivel Coupler Union Fitting Adapter Aluminum
    Product details Size   4/6/8/10/12AN Thread size AN4 thread size is 7/16-20 UNF AN6 thread size is 9/16-18 UNF AN8 thread size is 3/4-16 UNF AN10 thread size is 7/8-14 UNF AN12 thread size is 1 1/16-12 UNF Material   Aluminum Brand   EVIL...
    $12.79
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  • EVIL ENERGY EVIL ENERGY AN Extender Female to AN Male Extension Fitting Adapter Aluminum (4/6/8/10/12AN)EVIL ENERGY EVIL ENERGY AN Extender Female to AN Male Extension Fitting Adapter Aluminum (4/6/8/10/12AN)
    EVIL ENERGY AN Extender Female to AN Male Extension Fitting Adapter Aluminum (4/6/8/10/12AN)
      Size 4/6/8/10/12AN Material Aluminum Brand EVIL ENERGY Connector Type Flare Exterior Finish Aluminum Thread Type UNF About this item Size: Full Length: 36mm ,the thread size of AN4 is 7/16-20 UNF. Sealing: The AN side of the flare is sealed by a 37...
    $9.66
    $9.66
    $9.66
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  • Evilenergy EVIL ENERGY AN Female to AN Male Flare 45 Degree Swivel Fitting Adapter Aluminium Black（3/4/6/8/10AN）Evilenergy EVIL ENERGY 3/4/6/8/10AN Female to AN Male Flare 45 Degree Swivel Fitting Adapter Aluminium Black
    EVIL ENERGY AN Female to AN Male Flare 45 Degree Swivel Fitting Adapter Aluminium Black（3/4/6/8/10AN）
    Product details Size 3/4/6/8/10AN Material Aluminum Brand EVIL ENERGY Angle 45 Degree Connector Type Flare Exterior Finish Aluminum Thread Type NPT About this item [Size] The thread size of 3an is 3/8-24 UNF,4an is 7/16-20 UNF,6an is 9/16-18 UNF,8an is 3/4-16 UNF,10an is 7/8-14...
    $13.99
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  • [3AN][3AN,90 Degree]
    EVIL ENERGY AN Male to Male One Piece Full Flow Swivel Coupler Union Fitting Adapter Aluminum
    • Parameter: Max Working Pressure: 1500PSI. Working Temperature Range: -40℉ to 250℉.
    • Sealing: The AN side is sealed by a 37 degree angle.
    • Material: Made of aluminum alloy 6061-T6.
    • Feature: Features a unique cutter style and one piece full flow design for smoother flow.
    $9.99
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  • EVIL ENERGY EVIL ENERGY AN Male to Male Flare 45/90 Degree Union Coupler Fitting Coupling Aluminum Black ( 3/4/6/8/10/12AN)EVIL ENERGY EVIL ENERGY AN Male to Male Flare 45/90 Degree Union Coupler Fitting Coupling Aluminum Black ( 3/4/6/8/10/12AN)
    EVIL ENERGY AN Male to Male Flare 45/90 Degree Union Coupler Fitting Coupling Aluminum Black ( 3/4/6/8/10/12AN)
      Size 3/4/6/8/10/12AN Material Aluminum Brand EVIL ENERGY Color Black Connector Type Union Angle 45/90 Degree Exterior Finish Black Anodized Aluminum Thread Type UNF Number of Pieces 1   About this item Seal: The AN thread of the flare is sealed by a 37...
    $9.49
    $9.49
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  • [1PC][2PCS]
    EVIL ENERGY AN Female Swivel to AN Male Flare Expander Fitting Adapter 6061 T6 Aluminum Black
    • Precision AN Size Conversion
      Converts female AN to larger or smaller male AN connections for seamless fuel system upgrades and custom routing.
    • 37 Degree AN Flare Seal
      Utilizes a true 37 degree flare sealing surface to ensure leak free high pressure performance.
    • 6061 T6 Aluminum Construction
      CNC machined from lightweight yet strong 6061 T6 aluminum with black anodized corrosion resistant finish.
    • 1500 PSI High Pressure Rated
      Designed to handle demanding fuel oil and cooling system applications including EFI builds.
    • Swivel Design for Easy Alignment
      Female swivel end allows precise clocking and alignment during installation reducing hose stress.
    $9.79
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  • EVIL ENERGY EVIL ENERGY AN Female to AN Female 90 Degree One Piece Full Flow Swivel Coupler Union Fitting Adapter AluminumEVIL ENERGY EVIL ENERGY AN Female to AN Female 90 Degree One Piece Full Flow Swivel Coupler Union Fitting Adapter Aluminum
    EVIL ENERGY AN Female to AN Female 90 Degree One Piece Full Flow Swivel Coupler Union Fitting Adapter Aluminum
      Size 6/8/10/12/16AN Material Aluminum Brand EVIL ENERGY Thread Size 9/16-18 UNF Thread Type UNF   About this item Parameter: Max Working Pressure: 1500PSI. Working Temperature Range: -40℉ to 250℉. Sealing: The AN side is sealed by a 37 degree angle. Material: Made of...
    $19.99
    $19.99
    $19.99
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  • EVIL ENERGY AN to NPT Straight Aluminum Flare Fitting for Fuel, Cooling Systems, Blue - EVILENERGY[3AN,1/4]
    EVIL ENERGY AN to NPT Straight Aluminum Flare Fitting for Fuel, Cooling Systems, Blue
    • AN to NPT Conversion
      Connects AN hose ends to NPT threaded ports cleanly.
    • 37° Flare Seal Design
      Provides a reliable, leak-resistant AN connection.
    • High Pressure Rated
      Handles up to 1500 PSI for demanding systems.
    • 6061-T6 CNC Aluminum
      Lightweight, corrosion-resistant, and durable.
    • Multi-System Use
      Ideal for fuel and cooling system applications.
    $9.99
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  • [4AN,Straight][4AN,Straight]
    EVIL ENERGY 4/6/8/10AN Female To Female Straight/90 Degree Swivel Coupler Union Fitting Adapter Aluminum Red and Blue
    Product details Brand EVIL ENERGY Fitting Size 4/6/8/10AN Angle Straight,90 Degree Thread size AN4 thread size is 7/16-20 UNFAN6 thread size is 9/16-18 UNFAN8 thread size is 3/4-16 UNFAN10 thread size is 7/8-14 UNF Material 6061 T6 Aluminum Alloy Color Red&Blue Style Normal Thread...
    $8.99
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  • EVIL ENERGY AN Female 90 Degree Low Profile Swivel Coupler Union Red&Black Fitting Adapter Aluminum - EVILENERGYEVIL ENERGY AN Female 90 Degree Low Profile Swivel Coupler Union Red&Black Fitting Adapter Aluminum - EVILENERGY
    EVIL ENERGY AN Female 90 Degree Low Profile Swivel Coupler Union Red&Black Fitting Adapter Aluminum
    Product details Size   6/8/10AN Thread size AN6 thread size is 9/16-18 UNF AN8 thread size is 3/4-16 UNF AN10 thread size is 7/8-14 UNF Material   Aluminum Brand   EVIL ENERGY Angle 90 degree-Low Profile Connector Type   Elbow, Union Exterior   Aluminum...
    $17.55
    $17.55
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  • EVIL ENERGY AN Female to Female Swivel Coupler Union Fitting Aluminum Black[6AN Female to 8AN Female]
    EVIL ENERGY AN Female to Female Swivel Coupler Union Fitting Aluminum Black
    • Female to Female AN Coupler Connects different AN sizes for seamless fuel line extension and system integration
    • 360 Degree Swivel Design Allows flexible alignment and easy installation in tight engine spaces
    • High Pressure Performance Rated up to 1500 PSI for stable and reliable fuel system operation
    • Leak Free AN Seal Precision 37 degree flare ensures secure metal to metal sealing
    • Durable Reusable Build 6061 T6 aluminum construction supports long term use and repeated assembly
    $13.99
    $13.99
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  • EVIL ENERGY EVIL ENERGY AN Male to Male Stainless Steel Brake Coupler Union Straight Adapter FittingEVIL ENERGY EVIL ENERGY AN Male to Male Stainless Steel Brake Coupler Union Straight Adapter Fitting
    EVIL ENERGY AN Male to Male Stainless Steel Brake Coupler Union Straight Adapter Fitting
      Size 3AN to 3AN3AN to 4AN Material Stainless Steel Brand EVIL ENERGY Connector Type Union   About this item Seal: The AN thread of the flare is sealed by a 37 degree angle. Working temperature: -50℃ to 800℃ (58℉ to 1472℉). Material: Made...
    $9.99
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Related Articles & Videos

FAQs about AN to AN Fittings

As a beginner DIY enthusiast, are EVIL ENERGY AN fittings easy to install?

For most people working on garage projects, the evil energy an fittings series is designed to be extremely user-friendly. Unlike traditional compression joints that require specialized tools, every an fitting in our lineup features a 360° swivel design. This allows you to adjust the an hose fitting angle easily, even in cramped engine bays. Whether you are plumbing a complex fuel rail or a custom cooling system, evil energy fittings provide an intuitive installation experience. If you encounter mismatched ports, simply pair your setup with our an fitting adapters to achieve a seamless transition without replacing your entire line.

In high-performance applications like an LS Swap, the stability of your an fittings is non-negotiable. Evil Energy an fittings are pressure-tested up to 1500 PSI, making them more than capable of handling high-flow fuel systems and turbo oil feeds. Many professional builders specifically choose evil energy fuel pump fittings to connect high-output pumps, ensuring leak-free performance under intense G-forces. Since they are machined from 6061-T6 billet aluminum, every an fitting maintains its structural integrity despite heavy vibration, making them the preferred choice for the racing community.

Yes, modern fuel systems frequently utilize E85, which can be highly corrosive. To meet the demands of this application scenario, all evil energy fittings feature a high-grade anodized finish. This deep black protective layer prevents internal oxidation when evil energy an fittings are in constant contact with ethanol-based fuels. Whether it is the evil energy fuel pump fittings located inside the tank or the external an hose fitting connections, the sealing materials are engineered to resist fuel degradation. This durability is why our an fittings have earned such high trust among pro-tuners.

This is a common pain point that our SEO experts and technical staff frequently address. To solve compatibility issues between different automotive standards, we offer a vast selection of an fitting adapters. For example, if you need to connect an import oil cooler with metric threads to a standard an fittings line, you simply select the corresponding adapter. Every evil energy fitting follows strict AN industry tolerances to ensure thread precision. We recommend verifying your port size before finalizing your an hose fitting layout and using our an fitting adapters to eliminate the risk of cross-threading or leaks.

On social media, performance and 'bang for your buck' are everything. Evil Energy an fittings are frequently featured because they offer professional-grade performance at a fraction of the cost of legacy brands. YouTubers love demonstrating the quick assembly of an an hose fitting and the reliable seal of evil energy fuel pump fittings in high-pressure EFI systems. For builders who need to overhaul an entire vehicle, the consistency of evil energy fittings means they don't have to worry about a single an fitting failing during a build. This reputation for reliability has put our an fittings under the hoods of thousands of enthusiasts worldwide.

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