340 LPH Fuel Pump and Fitting Kit for LS Engine Applications
Swapping an LS engine into a 1991 through 2005 GM platform demands a reliable source of fuel at idle and full throttle. This 340 LPH Fuel Pump and Fitting Kit matches flow and pressure requirements by combining a robust pump with billet aluminum fittings that mate directly with the factory tank outlet. Installation stays straightforward thanks to a direct fit wiring harness adapter that retains the stock connector and circuit protection. Each seal is rated for system pressures and thermal cycling to maintain consistent delivery during spirited acceleration and sustained high rpm operation.
18-Gallon Capacity with Internal Baffling for Steady Flow
The 18-gallon tank capacity allows longer stretches between fill-ups, making it well suited to extended drives or track days. Inside the tank, a baffling system controls fuel movement during braking, cornering and acceleration, preventing the pump from drawing in air when the vehicle experiences lateral forces. By maintaining consistent fuel level around the pickup, the design eliminates intermittent starvation and preserves stable engine operation. Drivers will notice smooth throttle response even when diving into a turn or accelerating out of a corner, as the baffling ensures the pump remains submerged. This reliable delivery system removes a common weak point in stock tanks under spirited conditions.
Walbro 255 LPH Pump Integrated for Up to 550 HP Support
At the heart of the assembly sits a Walbro 255 LPH pump calibrated to supply engines up to 550 horsepower with sufficient fuel under all demands. The pump's robust electric motor and precision impeller maintain constant pressure through long pulls and hard accelerations, guarding against drops in flow at wide open throttle. Tuners seeking to upgrade ignition timing or boost levels can rely on this unit to keep pace with increased fuel requirements. Its performance stability across a wide range of temperatures ensures dependable operation on hot summer runs or in cooler climates. Paired with the tank's internal design, the pump becomes a seamless component in high-output LS installations.
Side Fill Neck and Frame Mount Design for Easy Installation
The side fill neck simplifies refueling by positioning the inlet in an accessible location on the bed side rather than directly under the truck, reducing the need to crawl underneath when topping off. A custom frame mount allows the tank to slide neatly under the rear rails, matching factory clearances and maintaining original ground clearance. Installers benefit from predrilled flange holes that align with common OEM rail specs, cutting out time usually spent on brackets or custom fabrication. Once secured, the unit presents a neat underbody profile that mirrors stock appearance, blending functionality with a clean finish. This attention to fitment eliminates clearance issues and streamlines the swap process.
Factory-Compatible Sending Unit for Precise Fuel Level Monitoring
An integrated 0–90 ohm sending unit communicates directly with the vehicle's original gauge cluster, providing accurate level readings without calibration. Its electrical characteristics match GM specifications, so needle sweep and warning light thresholds remain in sync with driver expectations. The float arm travels smoothly within the tank environment, resisting binding even as fuel sloshes during dynamic driving. By eliminating aftermarket gauge modules, the system retains cockpit familiarity and reduces potential wiring errors. Drivers can rely on the stock fuel gauge for precise feedback throughout each journey.
Count on consistent fuel delivery from MuscleRods; for the same tank design with a larger capacity pump at 400 LPH see our 1967-1972 Chevy Truck Frame Mount Gas Tank - Side Fill - 400 LPH Pump.