AdvanEX 255LPH Electric Fuel Pump replacement for GSS342-style tanks — high-flow 255 LPH, complete installation kit

This electric in-tank pump delivers a steady 255 liters per hour flow rate and is built to match OE performance while providing the higher capacity many modern engines and performance builds require. Every unit is new and tested before shipping and arrives with a full set of installation components so you can replace the pump without sourcing extra parts.

How does this pump perform compared with my original Walbro GSS342?

The AdvanEX 255LPH pump is engineered to meet or closely match the delivery characteristics of GSS342-style high-flow pumps while offering consistent output across typical operating voltages. It is 100% new and quality-tested before shipment to ensure reliable operation.

• Rated flow: 255 LPH for higher-than-stock supply
• Designed to fit common GSS342 housings and setups
• Electrical and flow tested at factory for consistency

What comes in the installation kit and is it easy to install?

The pump ships with a complete assortment of parts needed for installation so you won’t need to hunt down hoses or clamps. Basic mechanical skills and common tools are sufficient for many installations, but professional installation is recommended for safety and best results.

• Included: fuel pump, rubber hose, wire harness, rubber sleeve, foam sleeve, fuel strainer, two clamps
• Plug-and-play wiring harness for compatible vehicles
• Strainer and sleeves reduce debris and noise inside the tank

Will this pump work for both street and performance applications?

Yes — the 255 LPH capacity suits a wide range of vehicles from light trucks to tuned cars that need increased fuel delivery. It supports higher-demand engines without being overkill for moderately tuned street builds.

• Suitable for cars and trucks requiring high-flow performance
• Compatible with many stock and aftermarket fuel systems using GSS342-style units
• Helps maintain fuel pressure under load for consistent engine performance

What reliability and after-sale support does AdvanEX provide?

AdvanEX offers a one-year after-sales service policy and commits to responding to customer concerns quickly. If you experience issues or have installation questions, support aims to resolve them within 24 hours.

• One-year after-sale service included
• Customer support response goal: within 24 hours
• Each pump is tested before shipment to minimize early failures

Who is this for? Mechanics, DIY enthusiasts, and performance-minded drivers who need a dependable, higher-capacity in-tank fuel pump that replaces Walbro GSS342-style units will find this AdvanEX 255LPH pump well suited. It’s also a good choice for anyone upgrading fuel delivery on turbocharged or heavily modified engines, and for owners who prefer a replacement that comes with the hoses, harness, strainer and clamps required for a clean installation.