EVIL ENERGY EFI 255LPH Electric In-Tank Fuel Pump Kit — 12V High-Flow 43 PSI, Gasoline-Only

The EVIL ENERGY EFI 255LPH electric intank fuel pump kit is a high-flow, 12V EFI-compatible fuel delivery unit rated at 255 liters per hour (43 PSI) designed to replace or upgrade in-tank pumps for gasoline engines.

This compact, high-capacity pump provides a stable fuel stream for electronic fuel-injection systems and is engineered for performance applications that need higher flow and pressure range. It is intended for gasoline only and works within a broad operating pressure range, letting you set final system pressure with an external regulator. Installation often requires matching hose sizes and filters due to a different pump diameter compared with some original equipment units.

How much flow and pressure does this pump deliver?

The pump is specified at two common operating points: 255 LPH at 43 PSI and 190 LPH at 80 PSI, giving a flexible performance curve depending on system backpressure. The overall operating pressure window is 15–90 PSI; the final usable pressure should be set by your vehicle's regulator to meet injector and rail requirements.

• Primary test flow: 255 LPH measured at 43 PSI
• Alternate flow: 190 LPH measured at 80 PSI
• Operating pressure range: 15–90 PSI (set final pressure via regulator)
• Designed for typical EFI rail and injector setups requiring elevated flow

Will this fit my vehicle's fuel tank and electrical system?

This pump is built for 12V DC EFI systems only, so it suits most passenger cars, light trucks, and performance builds running standard automotive electrical systems. The manufacturer notes that the 255LPH pump's outer diameter may differ from some OE units, which can require changing hoses, fittings, or the sending unit basket for a proper fit.

• 12V DC EFI compatibility—confirm electrical connector and current draw
• In-tank installation—verify pump diameter and mounting arrangement
• Hose and filter swaps may be necessary for sealing and flow optimization
• Professional installation recommended to avoid leaks and electrical issues

What fuel and maintenance considerations should I know?

The EVIL ENERGY pump is designed for gasoline only; use of high-impurity or contaminated fuel can shorten pump life and impair performance. Keeping a clean filter and using quality fuel lines and clamps helps maintain consistent flow and prevents premature wear.

• Fuel type: gasoline only—do not use diesel, ethanol blends beyond manufacturer guidance, or contaminated fuels
• Regularly replace inline and tank filters to protect the pump from debris
• Use approved fuel-rated hoses and clamps for long-term reliability
• Inspect electrical connections and ground points during routine maintenance

How should I prepare for installation and tuning?

Because the pump can differ in diameter and flow from the original, plan for possible adapter fittings, updated hoses, and a compatible regulator to set safe rail pressure. Electrical wiring should match the pump's current requirements and include a proper fuse and relay; calibration of fuel pressure and injector duty cycle is advised after installation.

• Confirm pump diameter, outlet orientation, and mounting before ordering
• Upgrade hoses, clamps, and filters if needed to match pump dimensions
• Install an inline or external regulator to set final system pressure
• Use a fused relay and correct gauge wiring; perform pressure verification post-install

Who is this for: The EVIL ENERGY EFI 255LPH pump kit suits enthusiasts and mechanics upgrading stock fuel delivery for higher-horsepower gasoline EFI engines, or anyone needing a reliable, higher-flow in-tank solution for 12V systems. It is appropriate for performance street cars, light racing applications, and builds where increased flow at moderate pressures is required. Professional installation is recommended when tank modification, electrical changes, or fuel-system tuning are necessary to ensure safe, leak-free operation and correct pressure calibration.