EVIL ENERGY 300LPH High Flow External Inline Fuel Pump Kit Universal 12V with Pressure Regulator

The EVIL ENERGY 300LPH Fuel Pump is built for EFI users who need more stable fuel delivery than a weak factory pump can provide. If your build is dealing with fuel pressure drop, fuel starvation, poor high-RPM fuel supply, or inconsistent flow under load, this 12V Inline Fuel Pump helps keep fuel moving steadily to support your engine’s demand.

Designed as a Universal Inline Fuel Pump for 12V EFI systems, it delivers 300 LPH at 43 PSI / 13.5V with a maximum operating pressure of 75 PSI. This makes it a practical EFI Fuel Pump upgrade for turbocharged, supercharged, LS swap, street performance, track, and other high-output builds.

This External Fuel Pump supports gasoline and diesel applications when properly configured with oil-gas separation as needed. It can also be used as a Diesel Inline Pump in compatible 12V EFI fuel systems. For best performance, mount the pump below or near the fuel tank, use the proper pre-pump and post-pump filters, and make sure the wiring, relay, fuse, ground, and fuel-line routing are correctly set up.

Key 300LPH Inline Fuel Pump Features

• High Flow Rate: 300 LPH at 43 PSI / 13.5V for high-demand EFI systems
• Strong Pressure Support: Maximum operating pressure up to 75 PSI
• 12V EFI Fitment: Designed for 12–13.5V DC EFI systems only
• Gasoline & Diesel Compatible: Works with gasoline and diesel when properly configured
• External Inline Design: Easy to mount below or near the fuel tank for better gravity-fed supply
• Universal Application: Suitable for street performance, track builds, LS swaps, turbo builds, and custom EFI systems
• Durable Construction: Alloy steel body designed for heat and corrosion resistance
• Wide Temperature Range: Fuel pump operates from -68°F to 194°F
• Warranty: Backed by a 12-month EVIL ENERGY limited warranty

EVIL ENERGY 300LPH External Inline Fuel Pump Kit

The EVIL ENERGY 300LPH External Inline Fuel Pump is a 12V electric fuel pump designed for EFI fuel systems that need stable fuel flow under load. It helps solve common fuel delivery problems such as fuel pressure drop, fuel starvation, weak factory pump flow, and inconsistent high-RPM fuel supply.

This universal inline fuel pump is suitable for standard vehicle upgrades, LS swaps, turbocharged builds, supercharged builds, track cars, and custom performance fuel systems. The pump is built with a durable alloy steel body and supports gasoline and diesel applications when properly configured.

Key Inline Fuel Pump Details

• Pump Type: External inline fuel pump
• Voltage: 12V DC EFI system
• Flow Rate: 300 LPH
• Test Condition: 43 PSI at 13.5V
• Maximum Operating Pressure: 75 PSI
• Compatible Media: Gasoline and diesel, oil-gas separation needed
• Main Use: EFI fuel system upgrades, fuel pump replacement, LS swaps, and performance builds

For best performance, install the pump below or near the fuel tank to support gravity-fed fuel supply. Use proper filtration before and after the pump, and verify wiring, relay, fuse, ground, and fuel pressure before operation.

EVIL ENERGY 1060 Aluminum Fuel Line Kit

The EVIL ENERGY 1060 Aluminum Fuel Line Kit provides a lightweight and durable hard-line solution for high-pressure automotive fluid systems. It can be used for routing fuel, transmission oil, air, and other compatible automotive fluids.

The 25FT aluminum hard line is flexible enough for custom routing while offering corrosion resistance, heat transfer, and strong pressure support. It is a practical choice for LS swaps, restorations, diesel builds, gas fuel systems, AC retrofits, and performance upgrades.

Key Fuel Line Details

• Material: 1060 grade aluminum
• Length: 25FT
• Outer Diameter: 3/8 inch
• Inner Diameter: 0.32 inch
• Working Pressure: 700 PSI
• Burst Pressure: 2000 PSI
• Included Tools: Tube cutter, tube bender, and deburring tool
• Main Use: Fuel line routing, transmission oil line routing, air line routing, LS swaps, and custom builds

This kit helps users build a cleaner and more reliable fuel delivery system without sourcing each part separately. The included tools make it easier to cut, bend, deburr, and install the aluminum line during custom fuel-system installation.

EVIL ENERGY Universal Inline Fuel Pump – Broad Compatibility

The EVIL ENERGY 300LPH Fuel Pump is a 12V Inline Fuel Pump designed for reliable fuel delivery in EFI systems. It works with gasoline, race gas, ethanol, and diesel (oil-gas separation required).

This Universal Inline Fuel Pump provides:

• High Flow Rate: 300LPH at 43 PSI / 13.5V
• Maximum Operating Pressure: 75 PSI
• Versatility: Suitable for street performance, track cars, turbocharged or supercharged engines, LS swaps, and custom EFI builds
• Diesel Inline Pump Compatibility: Can be integrated into high-pressure diesel EFI systems when configured correctly

Installation Tips for Maximum Reliability

Proper installation improves pump performance and longevity. Follow these guidelines:

1. Mount the External Fuel Pump below or near the fuel tank for a gravity-fed supply.
2. Use the correct pre-pump (100-micron) and post-pump (10-micron) filters.
3. Follow flow-direction markings on the filters.
4. Keep the pump away from exhaust heat, moving parts, debris, and impact areas.
5. Verify wiring, fuse, relay, ground, fuel pressure, and line connections before use.

A properly installed 300LPH Fuel Pump helps prevent fuel starvation, air pockets, cavitation, and unstable pressure, ensuring consistent delivery for high-demand EFI engines.

Reliability for High-Performance EFI Systems

When selecting a high-flow fuel pump for EFI system applications, reliability is paramount. This 12V Fuel Pump is backed by a 12-month warranty, ensuring peace of mind for DIYers and mechanics alike. The EVIL ENERGY Fuel Pump remains a top-tier choice. Trust this 12V Electric Fuel Pump and 300LPH Fuel Pump system to power your passion.

Why Choose Evil Energy Fuel Pump?

Elevate your vehicle's performance with our top-tier fuel system components. We specialize in everything from 6AN Fitting and 10AN Fitting adapters to the high-performance EVIL ENERGY Fuel Pump. Specifically engineered for Cadillac, Chevrolet, GMC, Hummer, and Pontiac LS V8 engines, our products—including the 300LPH Fuel Pump—ensure seamless integration and hassle-free installation.

We prioritize quality control, ensuring each 12V Electric Fuel Pump meets rigorous standards for fitment and durability. Whether you are performing an External fuel pump installation or looking for a reliable diesel inline pump, we effectively address the common challenges faced by car enthusiasts.

For additional information or questions regarding your 12V Electric Fuel Pump, please contact us at support@ievilenergy.com.

Related Products You May Need

To create a complete and reliable fuel system, we recommend pairing the EVIL ENERGY 300LPH External Inline Fuel Pump with these products:

• LS Swap Fuel Line Kit (PTFE Hose + 300LPH Fuel Pump) –Upgrade your fuel lines and install a high-flow pump in one kit for smooth, stable EFI delivery.
• LS Swap Fuel System Kit with Inline Fuel Pump – A full LS swap solution including pump, lines, and AN fittings for custom builds.
• LS Swap Fuel Filter Regulator 58 PSI Kit – Ensures precise fuel pressure and clean fuel flow to protect injectors and performance engines.
• EVIL ENERGY LS Swap Fuel Kit (Filter + Hose + Fittings) – One-stop upgrade for LS fuel systems, simplifying installation with all essential components included.
• EFI Fuel System Kit with PTFE Fuel Line & 300LPH Pump – Perfect for high-performance EFI setups requiring stable, high-volume fuel delivery.
• Fuel Injection Line Kit with 300LPH Pump – Fuel Injection Line Kit with 300LPH Pump – Designed for consistent, efficient fuel flow in EFI builds.
• Fuel Filter + Regulator + 25FT CPE Hose Kit – Cost-effective solution for quick installation and clean, reliable fuel delivery.

Tools Required

• Jack and jack stands (if under-vehicle access or fuel-tank removal is required)
• Fuse puller
• Wrench set (do NOT use adjustable wrenches)
• Drill and drill bits (for mounting bracket)
• Fine-tooth hacksaw or cut-off wheel (for cutting CPE hose)
• Assembly lube
• Vise (for securing fittings)
• Fuel pressure gauge (0-100 PSI)
• Drain pan and shop towels
• Safety goggles and protective gloves
• Fire extinguisher

Pre-Installation Checklist

• Park vehicle on level surface in well-ventilated, no-smoking area
• Allow engine to cool completely before starting work
• Place fire extinguisher within reach of work area
• Wear safety goggles and protective gloves throughout installation
• Open fuse box and remove the fuel pump fuse
• Start engine to relieve residual fuel pressure — engine will stall on its own
• Disconnect negative battery cable
• Safely jack up the vehicle and support with jack stands

Installation Steps

1. Relieve fuel system pressure: remove fuel pump fuse, start engine to burn off residual fuel, disconnect battery
2. Remove OEM fuel pump; find a suitable chassis location for the new pump — position below the fuel tank, clear of exhaust and drivetrain
3. Install coarse fuel filter at pump inlet and fine-filtered fuel filter at pump outlet; follow arrow direction for fuel flow
4. Measure the CPE fuel hose routing path, cut to required length with a fine-tooth hacksaw, trim and smooth the cut end
5. Insert CPE hose into fittings: secure socket in a vise, screw hose counterclockwise, apply assembly lube to nipple, thread socket by hand then tighten with wrench
6. Connect the fuel pressure regulator to the CPE fuel hose
7. Re-insert fuel pump fuse, reconnect battery, turn ignition to ON (do not start) to prime the fuel pump
8. Start engine, check fuel pressure gauge, and adjust regulator to target pressure (OEM typically ~43 PSI)

Post-Installation Verification

• Inspect all fittings and hose connections for leaks before starting the engine
• Turn ignition to ON (do not start), let fuel pump run for a few seconds to pressurize — repeat 2-3 times
• If no fuel pressure, turn ignition OFF, wait one minute, then turn ON again — repeat until gauge shows pressure
• Start engine and check pressure gauge reading and all connection points for leaks
• Once desired pressure is achieved, tighten regulator lock nut
• Attach vacuum line to regulator (if applicable) and secure all fuel lines and wires to chassis
• Re-check all connections after driving 50-100 km — hoses may loosen slightly due to thermal expansion

Troubleshooting

• No fuel pressure: check fuse is reinstalled, verify pump wiring connections, repeat ignition ON/OFF prime cycle
• Fuel leak at fittings: shut off engine, relieve system pressure, re-tighten or reseat fittings with proper torque
• Pump vibration or noise: install vibration dampening mounting kit, check mounting bolt tightness
• Unstable fuel pressure: check for air in fuel lines, verify regulator adjustment, confirm fuel filter is not clogged
• Rough idle after install: confirm fuel filter arrow matches flow direction, check for vacuum leaks at regulator

Maintenance

• Visually inspect all fuel line connections every 5,000 miles or at each oil change
• Inspect or replace fuel filters every 15,000-30,000 miles
• Periodically check fuel pump mounting bracket and vibration dampener condition

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.

Disclaimer

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

If you need further information or assistance, feel free to ask!