EVIL ENERGY Fuel Filter Regulator 58PSI Inline Fuel Pump with 6AN CPE 25FT Fuel Hose Kit

EVIL ENERGY LS Swap Fuel Pump Kit with 58 PSI Regulator

Matching an external pump, fixed-pressure regulator, hose, and fittings can slow down an LS conversion and create fuel-pressure, routing, or connection problems when the components do not work together. This EVIL ENERGY LS swap fuel pump kit combines a 300LPH external pump, 58 PSI filter regulator, 25FT 6AN CPE line, and installation fittings. It is intended for experienced DIY builders and professional installers working on compatible LS-based engine swaps, classic trucks, restorations, and custom 12V EFI projects.

This is a custom-installation EFI fuel pump kit, not a vehicle-specific bolt-on package. Confirm that the fuel rail requires approximately 58 PSI and verify the tank outlet, return routing, available hose length, electrical circuit, and mounting space before ordering.

58 PSI Fuel Filter Regulator

The regulator combines fixed-pressure control with a built-in 10-micron filter. Fuel enters from the pump, filtered fuel is sent toward the engine, and excess fuel returns to the tank. This layout can simplify an LS-based EFI installation when the engine-side fuel rail is designed to receive a regulated 58 PSI supply.

• Published outlet pressure: 58 PSI / approximately 4 bar
• Filter rating: 10 microns
• Mounting: Stainless bracket with rubber insulator
• Important check: Confirm feed, outlet, and return connections before cutting or routing the hose

The regulator controls fuel pressure but does not create fuel flow. Pump capacity, wiring voltage, hose restriction, injector demand, and return-line routing still affect overall system operation.

25FT 6AN CPE Fuel Line and Fittings

The supplied 25FT 6AN CPE line allows the feed and return routing to be planned around the chassis. Its multi-layer construction combines a CPE inner tube, stainless steel reinforcement, and a nylon outer braid. The published 750 PSI working-pressure rating belongs to the hose, not the complete assembled fuel system.

• Length: 25FT
• Inside diameter: Approximately 0.31 in
• Outside diameter: Approximately 0.56 in
• Temperature range: −40°F to 257°F
• Published working pressure: 750 PSI
• Published burst pressure: 2,250 PSI

Plan the entire route before cutting the hose. Keep it away from exhaust heat, sharp edges, suspension movement, drivetrain components, and road-impact areas. Support long sections with suitable clamps and leave enough movement allowance between the engine and chassis.

300LPH External Inline Fuel Pump

The included 300LPH fuel pump is a 12V inline fuel pump for compatible EFI applications. Its published flow is 300 LPH at 43 PSI and 13.5V, 255 LPH at 43 PSI and 12V, and 200 LPH at 75 PSI and 12V.

The pump should be mounted externally near the tank and as low as the vehicle layout safely permits. Actual fuel delivery depends on pressure, voltage at the pump, wiring size, hose routing, regulator operation, fittings, inlet restriction, and fuel type.

Recommended Fuel-System Layout

Fuel Tank → 100-Micron Pre-Pump Filter → LS Swap Inline Fuel Pump → 58 PSI Filter Regulator → Fuel Rail → Return Line → Fuel Tank

The diagram shows a 100-micron pre-pump filter to help protect the external pump while limiting inlet restriction. That additional pre-filter is not included in the listed package unless it is specifically shown as part of the selected configuration.

Check Before Ordering

• Confirm the engine is an applicable LS-based 4.8L, 5.3L, or 6.0L platform.
• Confirm that the fuel rail requires approximately 58 PSI.
• Check the fuel-tank outlet and available external-pump mounting position.
• Plan both the feed and return-line routes before cutting the 25FT hose.
• Confirm the included fittings match the tank, regulator, rail, and hose ends.
• Verify that the relay, fuse, wiring, and ground can support the pump.
• Confirm complete-system fuel compatibility; do not assume E85 or methanol compatibility.
• Add a suitable coarse pre-pump filter when required by the pump and system layout.

Is This LS Fuel Pump Kit Right for Your Build?

This electric fuel pump and regulator package may be suitable when:

• You are building a compatible 12V LS-based EFI conversion.
• The engine-side fuel system requires a regulated 58 PSI supply.
• You want an external pump and serviceable fuel-line layout.
• You can fabricate and route the feed and return lines.
• You need the pump, regulator, hose, and main fittings in one package.

Choose another product or configuration when:

• The vehicle requires an in-tank fuel-pump module.
• The fuel rail requires an adjustable pressure instead of fixed 58 PSI.
• The application uses direct injection or another incompatible fuel system.
• You need verified E85 or methanol-compatible hose and seals.
• You require a complete bolt-on kit with tank, relay wiring, and pre-filter.

This fuel pump and filter package reduces the number of components that must be sourced separately, but custom mounting, plumbing, wiring, pressure testing, and leak inspection are still required.

Tools Required

• Jack and jack stands
• Wrench set (do NOT use adjustable wrenches)
• AN fittings and thread sealant
• Drill and drill bits (for mounting bracket)
• Fuel pressure gauge (0-100 PSI)
• Bowl or bucket (for catching spilled fuel)
• Shop towels and drain pan
• Safety goggles and protective gloves
• Fire extinguisher
• Fuse puller

Pre-Installation Checklist

• Park vehicle on a flat, well-ventilated surface; post No Smoking signs
• Allow engine to cool completely before starting work
• Keep fire extinguisher within arm's reach of the work area
• Always wear safety goggles and protective gloves when installing fuel filter and fuel pressure regulator
• Make sure the vehicle is off before replacing the fuse; the fuse must be removed
• Open the fuse box and locate the fuel pump fuse, then remove it; ensure the vehicle is not in gear
• Start the engine and let it run for a minute until it stalls, confirming fuel pressure has been released
• Do not open the fuel system until pressure has been fully relieved
• Disconnect the negative battery terminal to prevent accidental engine start
• Do not start the engine again after inserting the fuel pump fuse until installation is complete

Installation Steps

1. Relieve fuel system pressure: remove fuel pump fuse, start engine until it stalls, disconnect battery
2. Remove the old fuel filter: if located underneath the vehicle, safely jack up and support with jack stands; place a bowl or bucket beneath to catch spilled fuel; slide the fuel filter out of its bracket
3. Install the new fuel filter: identify inlet and outlet direction, position the new fuel filter in place, secure with brackets, tighten all clamps and fittings to ensure no movement or leaks
4. Install the fuel pressure regulator: ensure the engine has cooled and battery remains disconnected; remove cosmetic covers to access the fuel line area; remove vacuum line from OEM regulator (if applicable); use mounting bracket as template to mark and drill mounting holes; mount regulator to the vehicle; connect fuel lines using appropriate AN fittings; attach fuel pressure gauge to the 1/8" NPT port with thread sealant; connect vacuum line to regulator for boost/vacuum reference (if required)
5. Restore power and reconnect the system: lower the vehicle off jack stands; reconnect battery; turn ignition to ON (do not start) and cycle ON/OFF until fuel pressure gauge registers pressure; check for leaks at all connections; start the engine; turn clockwise to increase fuel pressure and counter-clockwise to decrease; once desired pressure is achieved, tighten the lock nut

Post-Installation Verification

• Before starting, inspect all fittings and fuel line connections for leaks
• Turn key to ON (do not start), let fuel pump run to pressurize — repeat 2-3 times until gauge shows reading
• If no fuel pressure, turn key OFF and wait one minute before cycling ON again
• Start the engine; check gauge reading and all connection points for leaks
• Adjust regulator to target pressure (turn clockwise to increase, counter-clockwise to decrease)
• Once at target pressure, tighten the lock nut
• Ensure spilled fuel is cleaned and removed from the work area
• After test drive, re-inspect all connections and confirm stable operation
• If leaks are found, turn ignition OFF, fix the issue, then retest

Troubleshooting

• No fuel pressure: check that fuel pump fuse is reinstalled, verify pump power wiring, repeat ON/OFF pressurization cycles
• Leaking at fittings: shut off engine and relieve system pressure, re-tighten or reinstall the fitting with correct o-rings
• Fuel filter installed incorrectly: confirm inlet/outlet direction markings match fuel flow direction
• Poor regulator performance: do not block vacuum port — leave open to atmosphere if vehicle has no vacuum line
• Unstable pressure: check fuel lines for air pockets, verify regulator setting, inspect filter for blockage
• Slight leakage through regulator adjustment screw: this is normal for all adjustable fuel pressure regulators and does not affect performance

Maintenance

• Visually inspect all fuel line connections every 5,000 miles or at each oil change
• Check and replace fuel filter every 15,000-30,000 miles depending on usage
• Periodically check regulator mounting bracket for tightness
• Inspect vacuum line connection (if applicable) for cracks or leaks
• Verify fuel pressure gauge reading periodically to ensure stable regulation

Brand Summary

Return Reasons

1. Quality Issues: Provide photos/videos; we cover return shipping.
2. Wrong Item Ordered: Buyer covers return shipping; email within 30 days.
3. Change of Mind: Buyer covers return shipping; email within 30 days.
4. Shipping Damage: Inspect packages; do not sign for damaged items.
5. Incorrect Item Shipped: Contact within 7 days.

Price Protection Policy

Effective from August 25, 2024. Price drops within 7 days of purchase can be claimed.

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EVIL ENERGY reserves the right to interpret, modify, or terminate this policy in accordance with applicable laws and regulations.

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