Walbro 255, 400 & 450 In-Tank Fuel Pumps for LS, Coyote, WRX, EVO, 2JZ

What This Walbro Collection Covers

Walbro performance fuel pumps are a standard upgrade for high-output EFI builds. This collection includes application-specific replacement assemblies and universal in-tank pumps that need to be matched to fuel type, target power, module design, wiring capacity, and the rest of the fuel system.

Walbro 255 lph Pumps

A proven performance upgrade

A 255 lph Walbro pump is a familiar solution for many naturally aspirated and moderately boosted builds. Confirm pressure requirement, current draw, fuel compatibility, and module hardware before installation.

Walbro 400 and 450 lph Pumps

Support higher fuel demand

F90000267 400 lph and F90000274 450 lph pumps are common choices for high-power gasoline and compatible ethanol builds. Larger pumps may require upgraded wiring, relays, fuel lines, injectors, and pressure control.

Vehicle-Specific Assemblies

Simplify the installation

Application-specific Walbro pump assemblies support direct replacement on many Ford Mustang and other factory modules. Verify the year, trim, engine, return or returnless system, and tank configuration.

Fuel System Planning

Build the whole system

Pump flow alone does not determine fuel capacity. Match the pump with suitable filters, wiring, rails, injectors, lines, regulator strategy, and ECU calibration for the intended fuel and power level.

Installation and Safety

Work clean and verify pressure

Relieve fuel pressure, keep ignition sources away, use fuel-rated hose and clamps, and inspect for leaks after installation. Confirm voltage at the pump under load rather than relying on static battery voltage.

Top Walbro Brands

• Walbro. High-flow in-tank pumps and application-specific fuel pump assemblies.
• Aeromotive. Fuel systems, pumps, regulators, rails, and filters for serious builds.
• DeatschWerks. High-flow pumps, injectors, and fuel-system components.
• Radium Engineering. Fuel surge tanks, rails, filters, and modular fuel solutions.
• Fuelab. Fuel pumps, regulators, filters, and delivery hardware.
• AEM. Fuel pumps, rails, and EFI electronics for performance vehicles.
• Holley. EFI fuel-system hardware for domestic and universal applications.
• MagnaFuel. Performance fuel pumps and fuel delivery components.
• TI Automotive. Motorsport fuel pump technology and OE-derived hardware.
• Bosch Motorsport. High-performance pumps, injectors, and engine management parts.
• Mishimoto. Fuel-system components and performance cooling hardware.
• Injector Dynamics. High-flow injectors and data-driven fuel delivery support.
• Fast. EFI systems, injectors, and fuel delivery components.
• Kinsler. Motorsport fuel injection and pump hardware.
• Vibrant Performance. AN fittings, hose, and fabrication parts for fuel systems.

How to Choose the Correct Walbro Fuel Pump

• Confirm exact year, make, model, engine, and fuel-tank module
• Match flow capacity to target horsepower and fuel type
• Check whether the build uses gasoline, E85, or another approved fuel
• Verify electrical connector style and pump dimensions
• Plan wiring, relay, fuse, and voltage capacity for high-flow pumps
• Match the pump to suitable filters, lines, rails, and injectors
• Confirm return or returnless fuel-system design
• Use a fuel-pressure gauge or sensor to verify operation
• Replace worn tank seals, sock filters, and module hardware as needed
• Have the calibration reviewed after a meaningful fuel-system change

Common Questions

What is a Walbro 255 fuel pump used for?

A Walbro 255 lph pump is commonly used as a high-flow in-tank upgrade for many naturally aspirated and boosted EFI builds.

What are Walbro 400 and 450 pumps?

They are high-flow in-tank pump families often selected for higher-power applications that require more fuel volume.

Do larger fuel pumps require wiring upgrades?

They can. Check current draw and voltage at the pump, then use appropriate wiring, relay, fuse, and connector hardware.

Can a Walbro pump run E85?

Fuel compatibility varies by pump and setup. Confirm the exact part number and plan the rest of the system for ethanol use.

Will a universal Walbro pump fit my factory module?

Not always. Compare dimensions, connectors, filter sock, mounting hardware, and module design before ordering.

Do I need larger injectors with a higher-flow pump?

A pump does not require injectors by itself, but injectors and calibration must support the intended power and fuel type.

What is an in-tank fuel pump?

An in-tank pump sits inside the fuel tank and sends fuel to the engine through the fuel delivery system.

Should I replace the fuel filter with a pump upgrade?

Inspect and replace restricted or old filters so the new pump is not working against a blockage.

Can I install a fuel pump myself?

Fuel-system work requires careful safety practices. Use correct tools, relieve pressure, and check thoroughly for leaks.

How do I confirm a new pump works correctly?

Verify fuel pressure, inspect for leaks, and measure voltage at the pump under operating load.

Why Buy Walbro from Black Ops Auto Works

Black Ops Auto Works stocks 108 Walbro SKUs with real fitment data, competitive pricing, and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, engine, and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our Fuel Pumps, Fuel Delivery, Fuel Filters, Fuel Rails, Fuel Injectors, Aeromotive, DeatschWerks, Radium Engineering.