TI Automotive Walbro GSS342 Fuel Pump 255LPH – EFP-058 In-Tank EFI Upgrade

The TI Automotive (Walbro) EFP-058 - GSS342 is the industry benchmark for upgrading factory in-tank fuel pumps in EFI vehicles.

If your goal is a reliable increase in fuel flow without overcomplicating your setup, this is the proven starting point. Used globally across street and performance builds, the 255LPH platform delivers consistent fuel supply under load while maintaining OEM-level reliability.

This isn’t a “race-only” pump. It’s the most common, safest upgrade for customers stepping beyond stock fuel systems.

Key Specifications

• Flow Rate: Up to 255LPH (free flow)
• Operating Flow: ~190–255LPH @ 3 bar
• Max Pressure: ~112 PSI (7.7 bar)
• Voltage: 12V
• Current Draw: ~8A @ 3 bar
• Body Size: 39mm (standard in-tank fitment)
• Outlet: 5/16” (8–9mm)
• Configuration: In-tank, inline inlet (GSS342)

Ideal applications:

• OEM fuel pump replacement with added capacity
• Naturally aspirated performance upgrades
• Mild to moderate turbo / supercharged setups
• Street-driven performance vehicles
• Drop in for EA, EB, ED, EF, EL Falcon.
  Also suits 95-97 Subaru Impreza WRX, Nissan 200SX S14, S15, Skyline R33 & R34, XE/XF Falcon EFI and many more.

Typical power support:
~300–500HP depending on fuel type and system setup

Proven platform
The GSS342 design has been used for decades across thousands of builds worldwide

Stable fuel delivery under load
Maintains flow as pressure increases, critical for EFI systems

Drop-in compatibility
39mm body suits most factory fuel modules with minimal modification

OEM-level manufacturing
Built by TI Automotive (Walbro), a global OE supplier

This pump is not designed for:

• High boost / big turbo builds
• Full E85 or ethanol-heavy setups (standard variant)
• 500HP+ applications running high base pressure

If you’re chasing higher power levels, you should be stepping up to a 460LPH or 525LPH solution.

What You’re Getting

• Genuine TI Automotive (Walbro) GSS342 Fuel Pump (EFP-058)
• installation kit including:
• Pickup filter
• Foam isolation sleeve
• Wire harness
• Hose clamps