340 LPH Fuel Pump and Fitting Kit for LS Engine Fuel Tank Upgrades
When converting a 1991 to 2005 GM chassis for an LS transplant, accurate fuel delivery can make or break drivability so this 340 LPH Fuel Pump and Fitting Kit is engineered to supply steady volume directly from your stock tank. Machined fittings match factory ports and the included mounting bracket aligns with existing holes to avoid cutting lines or hunting adapters during installation. By meeting the higher flow requirements of small block LS motors the kit removes guesswork around pressure and volume under dynamic throttle changes. It sustains pressure during sustained loads and lateral forces keeping ECU fuel commands within range from idle through hard acceleration.
Precision Frame Rail Mounting for Secure Fuel Tank Fitment
The custom mounting bracket aligns with existing frame rail holes beneath the rear axle, providing a secure attachment point without altering sheet metal or removing bed components. By situating the fuel tank under the rear rails, this design preserves valuable cargo space and contributes to a lower center of gravity, which improves handling balance and stability. The simplicity of the fitment process reduces installation time and labor costs while ensuring that the tank remains protected from road debris and off-road hazards. This precision alignment also helps maintain the vehicle's original appearance and factory ground clearance. Overall, the bracket architecture makes integration into 1991 to 2005 GM chassis models both reliable and repeatable.
Optimized Walbro 400 LPH Pump for Reliable Fuel Delivery
At the heart of the kit is a premium Walbro pump rated at 400 liters per hour, capable of supporting engines producing up to 750 horsepower. Its internal design features precision-machined components that minimize pressure drop and maintain consistent flow under varying throttle conditions. By controlling heat generation and sustaining steady volume during extended wide-open throttle periods, the pump helps prevent lean spikes that could cause hesitation or engine damage. This stability is essential for both spirited street driving and competitive track use where engine response must remain predictable. The EFI ready calibration simplifies the tuning process by keeping fuel pressure within the ECU's expected range.
Advanced Internal Baffling to Prevent Fuel Starvation
Engineered to combat the effects of lateral forces during cornering and braking, the fuel tank incorporates a multi-chamber baffling system. Strategically placed plates and partitions channel fluid directly to the pump inlet, ensuring that even under aggressive maneuvers the pump remains fully submerged. By eliminating air pockets that can trigger erratic sensor readings, this baffling design safeguards the fuel pressure regulator and keeps the engine control unit operating with accurate data. The result is a consistent fuel supply from initial acceleration through sustained high-load conditions. Drivers benefit from smooth throttle modulation without the risk of power loss due to momentary starvation.
Seamless Gauge Integration with 0 to 90 Ohm Sending Unit
Replacing the stock sending mechanism, the included 0 to 90 ohm unit provides direct compatibility with the factory fuel gauge circuits found in 1991 to 2005 GM models. This approach eliminates the need for resistive adapters or complex rewiring, preserving the original dashboard function and appearance. Calibration across the full range ensures accurate level readings within the 18-gallon tank, helping to avoid surprises on long drives. Combined with the period-correct bed fill neck, refueling retains the familiar feel of the original system while delivering the modern reliability of electronic fuel injection. Installation of the sending unit relies on the same bolt pattern as the OEM assembly, further simplifying the upgrade path.
This fuel tank kit delivers a reliable fuel supply throughout your LS engine conversion and ensures consistent performance under all driving conditions.