Fuel Filter Regulators

Unstable fuel pressure and contaminated fuel can cause difficult starting, inconsistent injector operation, and avoidable EFI troubleshooting. The Evil Energy fuel filter regulator combines a fixed 58 PSI bypass regulator with a built-in 10-micron filter for listed 1999–2014 Chevrolet 4.8L, 5.3L, and 6.0L LS based applications. In one compact component, this fuel filter with pressure regulator filters fuel before it reaches the rail and routes excess fuel back to the tank. Confirm that your fuel rail and calibration require approximately 58 PSI before selecting this setup.

Choose the Right Fuel Filter Pressure Regulator for Your LS Swap

If your fuel pump and lines are already planned, the standalone 58 PSI fuel filter regulator includes a 3/8-inch inlet fitting, a 5/16-inch return fitting, a 6AN to 3/8-inch engine outlet fitting, a mounting bracket, and a rubber insulator. If you are planning more of the system at once, the complete LS swap fuel kit offers selectable configurations with an external pump and, on the CPE or PTFE variants, 25FT of 6AN hose and matching fittings. Always compare the exact contents of the selected variant before ordering.

Quick fit check: Confirm the fuel rail’s 58 PSI target, pump delivery at operating pressure, inlet and return connection sizes, a safe return path to the tank, and the hose and fuel compatibility of the selected configuration.

How a Corvette Fuel Filter Regulator Simplifies Returnless LS Plumbing

A Corvette fuel filter regulator style layout combines final filtration and pressure control in one three-port component: fuel enters from the pump, a regulated feed continues to the engine, and excess fuel returns to the tank. The return line is not eliminated; the return point is moved away from the fuel rail so only one regulated supply line needs to run forward to the engine. This layout can reduce hose length and the number of separate components. If your system requires pressure other than 58 PSI or manifold-referenced pressure control, compare adjustable fuel pressure regulators instead. For a fuller system comparison, read the return style vs. returnless fuel system guide.

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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.

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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
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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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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.
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  • [Fuel Filter Regulator Kit(No Lines)][LS Swap CPE Fuel Kit]
    EVIL ENERGY Universal LS Swap Fuel Kit - 58psi Regulator, 300LPH Pump & AN Fuel Lines Compatible with E85/Gas/Diesel

    High-Performance LS Fuel System Kit

    • Optimized for 1999-2014 Chevy LS engines (4.8L/5.3L/6.0L) and swaps(LS-based engines).
    • this complete fuel system upgrade includes a 58psi fuel pressure regulator with 10-micron filtration, a high-flow fuel pump (200-300LPH), and 6AN PTFE braided fuel lines (1500psi rated). Ensures reliable fuel delivery for gasoline, E85, and diesel applications. Ideal for LS engine builds, performance upgrades, and boosted applications with durable, precision-engineered components.
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  • EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion – full kit with regulator, bracket, and AN fittings.EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion – detailed close-ups of ports and mounting bracket.
    EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion

    Compatible with 1999-2014 Chevrolet V8 4.8L/5.3L/6.0L (LS-based engines).

    $39.99
    $39.99
    $44.99

FAQs about Fuel Filter Regulators

How do I choose the right fuel filter pressure regulator for an LS swap?

Start with the pressure required by the fuel rail and EFI calibration. The Evil Energy regulators in this collection provide a fixed output of approximately 58 PSI, so they should be selected only for systems designed to operate at that pressure. Also verify the pump’s delivered flow at 58 PSI, the feed and return line sizes, the three port connection layout, fuel compatibility, and available mounting space. If the engine requires carburetor pressure, adjustable pressure, or manifold-referenced regulation, a fixed 58 PSI regulator is not the correct choice.

An Evil Energy fuel filter regulator performs final fuel filtration and pressure regulation in one component. Its built-in 10-micron filter helps prevent fine contaminants from reaching the injectors, while the internal bypass maintains approximately 58 PSI and routes excess fuel back to the tank. This can reduce the number of separate filters, regulators, fittings, and long engine-side return lines required in an LS swap. The regulator does not increase fuel pump capacity or horsepower by itself, so the pump, injectors, hoses, and return line must still be sized for the engine’s actual demand.

No. This Corvette fuel filter regulator style unit is a fixed, non-adjustable 58 PSI bypass regulator. It still requires a return line from the regulator to the fuel tank. “Returnless” describes the engine-side fuel rail, where only one regulated feed line runs to the engine; it does not mean that the entire system operates without a return path. The Corvette style description refers to the plumbing layout and should not be treated as proof of direct vehicle fitment.

Follow the markings and flow diagram on the regulator rather than identifying the ports only by their physical position. On the listed Evil Energy unit, fuel from the pump connects to the 3/8-inch inlet, the 5/16-inch port returns excess fuel to the tank, and the engine outlet connects to the fuel rail using the supplied 6AN to 3/8-inch fitting. A restricted, blocked, or incorrectly connected return line can prevent proper pressure regulation. Prime the system and inspect every connection for leaks before operating the vehicle.

Install the LS fuel filter regulator between the fuel pump and engine in a rigid, protected location that allows safe feed and return routing. Use the supplied bracket and rubber insulator, keep the assembly away from exhaust heat, moving components, sharp edges, and road-impact areas, and avoid unnecessary restriction in the return line. The best exact location depends on the tank, chassis, pump, and hose layout, so plan the complete route before drilling mounts or cutting hose.

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