340 LPH Fuel Pump and Fitting Kit for LS Engine Swaps
When integrating an LS power plant into GM chassis from 1991 through 2005, fuel delivery can suffer from restrictive stock tank outlets and uneven flow at idle or wide open throttle. At its core, the electric unit delivers 340 liters per hour at OEM pressure targets while billet aluminum fittings thread into the factory outlet for a leak free, direct fit solution. A dedicated wiring harness adapter preserves the stock connector and circuit protection, and pre routed leads simplify hookup without splicing or additional relays. High temperature seals engineered for repeated thermal cycling maintain consistent pressure under sustained high rpm operation, and every component aligns with the original fuel circuit to make installation straightforward.
Optimized Fuel Capacity and Baffling for Dynamic Driving
The 18 gallon tank not only extends your range between fill ups but also provides a generous reserve for spirited cornering and long highway runs. Inside, a multi chamber baffling system controls fuel motion under braking, acceleration and lateral forces to prevent air pockets from forming at the pickup inlet. By keeping gasoline pooled around the inlet, this design eliminates momentary drops in pressure that can cause hesitation or lean spots when the chassis is under load. The result is a consistent throttle response and stable fuel pressure even when the vehicle transitions from sweepers to tight turns. This integrated approach removes a frequent limitation found in stock tanks during aggressive driving.
Walbro 255 LPH Pump Delivering Stable Flow for High Output V8
At the heart of this kit is a Walbro pump capable of flowing 255 liters per hour at system pressure, matching the demands of engines up to 550 horsepower. Its precision machined impeller and reinforced electric motor maintain a constant flow rate through wide open throttle pulls, guarding against drops during sustained high rpm runs. The pump's internal design tolerates a broad temperature range so performance remains consistent on scorching summer days or cooler spring mornings. Tuners adding boost or advancing timing can rely on this unit to keep pace with elevated fuel requirements without sacrificing pressure stability. Matched to the tank geometry, it creates a seamless feed into the LS fuel rail.
Direct Fit Frame Mount and Side Fill Neck for Simplified Installation
The side fill neck relocates the fuel inlet to the bed wall, removing the need to crawl beneath the chassis every time you top up. This practical orientation is paired with a custom frame mount that slides neatly into factory rear rail spaces, preserving original ground clearance and preventing interference with suspension parts. Predrilled flange holes line up with common GM frame specifications, so no extra brackets or fabrication work is required. Once installed, the assembly hugs the underbody profile to maintain a factory appearance and reduce the risk of loose straps. Installers appreciate how these features cut hours off a typical swap.
Accurate Factory Gauge Integration with 0 to 90 Ohm Sending Unit
An integrated sending unit in the 0 to 90 ohm range allows the stock instrument cluster to display precise fuel levels without any aftermarket modules. The electrical response curve matches GM specifications so needle sweep, low level warning and reserve light thresholds operate just as the driver expects. The float arm glides smoothly and resists binding even as fuel sloshes during hard turns or quick lane changes, maintaining stable readings under dynamic conditions. By eliminating the need for calibration routines or extra indicator lights, this plug and play solution preserves cockpit familiarity and builds confidence in level accuracy.
Enjoy consistent fuel supply on every run from this 340 LPH kit designed for precise fit and operation. To complete your project with the same gas tank but with a larger capacity pump at 400 LPH see our 1967-1972 Chevy Truck Frame Mount Gas Tank - Side Fill - 400 LPH Pump.