Walbro BKS1003-4 650LPH Brushless High-Flow Fuel Pump Kit

Product Overview

• Walbro BKS1003-4 brushless high-flow in-tank fuel pump kit (universal)

Features

• High-performance brushless fuel pump designed for demanding EFI applications
• Delivers approximately 650 liters per hour of fuel flow for high-output engines
• Brushless motor design for lower electrical draw and long service life
• Compatible with gasoline and ethanol blends (E85) with proper setup
• Universal in-tank fit for many custom and performance fuel systems
• Compact housing simplifies installation in many fuel tanks
• High pressure support for turbo, supercharged, and high-HP naturally aspirated engines
• Includes wiring harness and installation instructions for easier setup

Specifications

• Part Number: BKS1003-4
• Pump Type: In-tank electric brushless fuel pump kit
• Fuel Compatibility: Gasoline and ethanol blends (E85) with calibrations
• Max Flow Rate: ~650 L/hr (~172 GPH)
• Operating Voltage: 12 V automotive system
• Pressure Capability: High pressure suitable for EFI systems
• Pump Design: Brushless screw (efficient and durable)
• Fitment: Universal kit - in-tank installation requires custom hangers/hardware

Included Components

• 1x Walbro BKS1003-4 brushless high-flow fuel pump
• 1x Fuel pump wiring harness
• 1x High-performance fuel filter/pre-filter
• Installation instructions

Product Description

The Walbro BKS1003-4 Fuel Pump Kit is a high-flow, universal in-tank solution built for performance and motorsport oriented fuel systems. With a flow capacity of around **650 liters per hour**, this brushless pump is designed to support engines with high fueling demands - including high-horsepower naturally aspirated builds and forced induction setups. Its brushless design promotes efficient electrical use and long-term reliability, operating on a standard 12-volt automotive electrical system.

This kit includes the pump itself, a compatible wiring harness for installation, and a high-performance inlet filter to help protect the pump and vehicle fuel system. Because it is a universal in-tank design, installation typically involves adapting or using a compatible fuel pump hanger or module that accepts this size and style, making it ideal for custom fuel systems, EFI conversions, or race vehicles that need robust fuel delivery. Ensure proper regulator and calibration matching for gasoline or ethanol blends before tuning and use.