340 LPH LS Fuel Pump and Fitting Kit for GM Models
When fitting an LS engine into a 1991 to 2005 GM chassis maintaining steady fuel pressure becomes critical and the 340 LPH Fuel Pump and Fitting Kit for GM Models is built to meet that need. It combines a high output Walbro pump rated at 340 liters per hour with precision machined adapters and corrosion resistant fittings that integrate directly with factory fuel lines to avoid in tank modifications. A baffled inlet design holds fuel around the pickup during sharp braking and tight turns and the calibrated zero to thirty ohm sending unit delivers accurate level readings on original GM gauges.
Precision Internal Baffle Design for Consistent Fuel Pickup
The fuel tank's baffled chambers channel gasoline directly around the intake screen, preventing fuel starvation during hard braking, acceleration, or cornering. By isolating slosh in dedicated compartments, the system maintains pump inlet pressure and avoids cavitation that can cause hesitation or surge. This constant coverage not only protects the pump from dry running but also extends its service life by reducing wear on internal components. Drivers experience a smooth throttle response in aggressive maneuvers, with no loss of flow even when the tank level is low. In practical terms, that means predictable power delivery whether sprinting off the line or carving through tight turns.
In-Tank Pump Placement with Direct Cooling and Leak Reduction
Mounting the Walbro unit inside the fuel tank immerses it in gasoline, using the fuel itself as a thermal medium to dissipate heat generated at high output. This internal cooling prevents overheating during sustained high demand, such as track sessions or towing, and safeguards pump performance over thousands of hours of operation. Integrating the pump into the tank eliminates external feed lines, greatly reducing potential leak points under the vehicle. Noise and vibration are also damped by the surrounding liquid, resulting in a quieter cabin experience. Precision machined adapters ensure a seamless connection to factory fuel lines without tank modifications.
Calibrated Sending Unit for Direct Factory Gauge Integration
The sending unit features a linear zero to thirty ohm output that matches original GM instrument cluster requirements, so no gauge recalibration is needed after installation. Its smooth response curve delivers accurate level readings, preserving the familiar needle movement that drivers trust. Standard automotive connectors plug directly into the existing engine harness without splicing or adapter cables. By retaining the tank's venting and pressure balance, the unit supports proper EFI function and prevents false low warnings. The precise calibration across all driving angles helps avoid surprises on long trips or spirited drives.
18 Gallon Tank Volume and Chassis-Friendly Fitment
With an 18 gallon capacity, this fuel tank extends driving range and cuts refueling stops, making it ideal for road trips or performance outings. The molded shape fits neatly between frame rails on 1991 through 2005 GM chassis, preserving ride height and ground clearance without custom brackets or trimming. A factory-style filler neck maintains original ergonomics for quick, spill-free refueling sessions. Positioning the tank low in the chassis lowers the center of gravity and enhances handling balance. Precision mounting flanges align with existing holes, allowing a drop-in installation that streamlines LS engine swap projects.