340 LPH Fuel Pump and Fitting Kit for LS Engines
Swapping an LS power plant into a 1991 through 2005 GM chassis often runs into stock tank outlet restrictions and poor delivery at both idle and full throttle. This 340 LPH Fuel Pump and Fitting Kit is engineered to match OEM flow and pressure requirements by combining a precision motor with billet aluminum fittings that thread directly into the factory tank outlet. A wiring harness adapter preserves the stock connector and circuit protection while seals rated for system pressures and thermal cycling ensure steady delivery under load. Installation is quick and avoids extra fabrication by using direct fit components that align with the factory fuel circuit.
Advanced Fuel Management with Baffling and 18 Gallon Capacity
The 18 gallon reservoir not only extends range between fill ups but also provides ample reserve for spirited driving or long highway stretches. Inside the tank, a multi chamber baffling system controls the motion of gasoline under braking, cornering and acceleration to prevent air from entering the pickup. By keeping fuel pooled around the inlet, this design eliminates momentary drops in pressure that can cause hesitation or lean conditions when the vehicle generates lateral forces. In practice, drivers will notice a consistent pedal feel whether rolling through a sweep or launcher starts from a stop. This integrated approach to capacity and fluid control removes a frequent limitation of stock tanks under dynamic conditions.
Walbro 255 LPH Pump Meeting Demands up to 550 HP
At its core this kit features a Walbro 255 LPH unit engineered to support engine outputs up to 550 horsepower without sacrificing pressure stability. The pump's precision impeller and robust electric motor deliver a steady flow rate through wide open throttle pulls, guarding against the dips that can occur during sustained high rpm operation. Its internal design tolerates a broad temperature range, so performance remains consistent on hot summer drives or cooler morning cruises. Tuners adding boost or advancing ignition timing can rely on this assembly to keep pace with elevated fuel demands. The matched pairing of pump and tank geometry ensures a seamless feed into the LS fuel rail.
Side Fill Neck and Precision Frame Mount Fit
The side fill neck relocates the inlet to an accessible position at the bed wall, eliminating the need to crawl under the chassis every time the tank needs topping off. This practical orientation pairs with a custom frame mount that slides neatly into factory rear rail spaces, preserving original ground clearance and preventing interference with suspension components. Predrilled flange holes align with common GM frame specifications, removing the need for additional brackets or custom fabrication during installation. Once in place, the assembly hugs the underbody profile to maintain a factory appearance and reduce drag from loose straps or ill fitting supports. Installers appreciate how these features combine to cut hours off the swap process.
Factory Gauge Compatibility through Integrated Sending Unit
An integrated 0 to 90 ohm sending unit allows the stock instrument cluster to display accurate fuel levels without modification or aftermarket modules. The electrical response curve matches GM specifications so the needle sweep, low level warning and reserve light thresholds operate exactly as the driver expects. The float arm travels smoothly and resists binding even as fuel sloshes during quick direction changes, maintaining stable readings throughout spirited maneuvers. This direct fit approach reduces wiring complexity and eliminates the need for calibration routines or extra indicator lights. The result is a plug and play upgrade that preserves cockpit familiarity and builds confidence in level accuracy.
Count on MuscleRods for consistent fuel performance in your LS swap. For the same gas tank but with a larger capacity pump at 400 LPH consider our 1967-1972 Chevy Truck Frame Mount Gas Tank - Side Fill - 400 LPH Pump.