340 LPH LS Fuel Pump and Fitting Kit for GM Vehicles
When dropping an LS mill into a 1991 to 2005 GM chassis, maintaining a steady supply of fuel under braking and heavy acceleration becomes a primary concern that can make or break engine reliability and performance. This 340 LPH Fuel Pump and Fitting Kit for GM Vehicles pairs a robust Walbro pump rated at 340 liters per hour with precision machined adapters and corrosion resistant fittings that hook directly into factory lines to avoid in tank modifications. Its baffled inlet chamber holds gasoline around the intake screen to prevent cavitation during sharp turns and the zero to thirty ohm sending unit delivers accurate level readings on original GM gauges.
Advanced Baffle Geometry for Stable Fuel Flow
The tank's internal chambers are carefully shaped to guide gasoline evenly around the pump inlet during hard braking and sharp cornering. Engineers modelled the baffle walls to break up slosh and prevent fuel from shifting away from the pickup, which can cause a drop in inlet pressure. By isolating fuel in dedicated compartments, the system maintains a constant feed to the pump and eliminates cavitation that leads to hesitation or surge on throttle. This level of control protects the Walbro unit from dry running and reduces wear on internal impeller and seals. The result is a smoother throttle response with no loss of flow even when tank levels are low. For drivers, this translates into predictable power delivery under all driving conditions.
Immersed Walbro 400 LPH Pump for Heat Management
Positioning the Walbro 400 LPH pump inside the tank ensures it is fully immersed in gasoline, using the liquid as a natural coolant to dissipate heat generated at high flow rates. This internal cooling protects the unit from overheating during sustained periods of heavy demand, such as spirited track sessions or towing scenarios. Integrating the pump within the tank also removes the need for external plumbing, reducing potential leak paths and simplifying the fuel system layout. The surrounding fuel mass dampens noise and vibration, resulting in a quieter cabin environment. Thanks to its high flow capacity, the pump can support up to seven hundred fifty horsepower on modern LS engines. Precision machined fittings guarantee a secure and leak free connection to factory fuel lines without any in tank modifications.
Factory Compatible Sending Unit for Reliable Gauge Feedback
The calibrated sending unit delivers a linear zero to thirty ohm signal that matches original GM instrument cluster resistance curves for seamless gauge operation. No recalibration or adapter cables are required, so the factory needle sweep remains accurate and familiar. By maintaining proper venting and pressure balance, the sender supports reliable fuel injection system performance and prevents false low fuel warnings. Standard GM connectors plug directly into the existing harness, preserving the integrity of the factory wiring. The smooth response curve ensures precise level information in all acceleration or deceleration scenarios. Drivers can monitor remaining range with confidence, even during aggressive maneuvers.
Extended Capacity and Chassis Friendly Fitment
With its eighteen gallon capacity, this fuel tank extends driving range and reduces the frequency of pit stops on long trips or performance outings. The molded shape is designed specifically for 1991 through 2005 GM chassis, fitting neatly between frame rails without trimming or custom brackets. A factory style filler neck preserves the original refueling ergonomics and ensures spill free operation. By mounting the tank low in the chassis, the design lowers the center of gravity and improves handling response. Precision mounting flanges align with existing holes to enable a true drop in installation that streamlines any LS engine swap project. The low profile form retains factory ride height and ground clearance for uncompromised underbody protection.
Designed for exact fitment and reliable operation in LS swap installations, this fuel tank ensures consistent delivery and peace of mind.