KEMSO 340LPH High Performance Fuel Pump | Replaces Walbro 255LPH GSS341

KEMSO 340LPH High Performance Fuel Pump

Meet the KEMSO 340LPH High Performance Fuel Pump, a drop-in replacement designed to upgrade the flow and reliability of your fueling system while preserving compatibility with a range of performance builds. This pump is built to support higher demand without compromise, offering a practical upgrade path from older, lower-flow units.

Engineered for gasoline and E85, it handles a spectrum of setups—from naturally aspirated enthusiasts to turbocharged and supercharged configurations. The bypass valve is set at 125.8 psi, a threshold that helps maintain steady pressure under peak loads, which matters when the fuel system is asked to deliver during spirited driving and sustained boost moments.

The serialized pump body carries a lifetime warranty, underscoring Kemso's commitment to durability and long-term service. In addition, you can count on USA-based technical support from knowledgeable technicians who can assist with installation questions and compatibility concerns.

Key benefits at a glance

• ✔ Up to 600 BHP capable in NA, turbocharged, or supercharged configurations (with appropriate tuned systems)
• ✔ Compatible with gasoline or E85 fuels for flexible fueling options
• ✔ Bypass valve set at 125.8 psi to sustain fuel pressure under high demand
• ✔ Serialized body offers lifetime warranty and traceable production history
• ✔ USA-based support provides direct access to technical expertise

Better performance with consistent fuel supply

By delivering consistent flow, the 340LPH pump helps reduce fuel starvation risk during high-load moments, especially when boost or throttle input is aggressive. It’s designed for dependable operation under demanding conditions while leaving room for user-driven tuning and setup decisions.

Real-world scenarios

• Track-ready builds that push fuel demand during full-throttle runs
• Street-driven tuned cars that run on premium or E85 fuel blends
• Projects replacing older Walbro units with a modern, high-flow option

Note: Always confirm compatibility with your fuel system, wiring, and fuel rail when upgrading to a high-flow pump. This product is a drop-in upgrade in many setups but may require tuning or ancillary equipment for optimal results.