LS EFI Sending Unit and In-Tank Fuel Pump for G-Body
For G-Body owners planning an LS EFI conversion, reliable in tank fuel management starts with the EFI sending unit and pump designed for your tank. This EFI sending unit and in tank pump package pairs a 3/8 inch sender calibrated to your factory gauge with a Walbro 255 liter per hour pump to maintain accurate fuel levels and consistent pressure for engines up to 550 horsepower. Installation taps into the original tank flange and seal interface, requiring only a few pilot holes to complete the swap. By integrating with stock tank hardware, it preserves the factory appearance while providing dependable EFI performance.
Precision 3/8 Inch Sending Unit Ensures Reliable Gauge Accuracy
The 3/8 inch feed-line sending unit is engineered to match the original float mechanism and resistance curve of your G-Body gauge, delivering consistent readings without calibration fuss. Its snug fit minimizes slop and vibration, so the needle remains steady even during spirited cornering. By tapping directly into the existing tank pickup, this unit eliminates extra adapters and leak points, ensuring long-term reliability. Precision machining of the sender housing keeps electrical contacts secure, translating to accurate fuel level reporting every time you turn the key.
High-Flow Walbro 255lph Pump Maintains Steady Pressure
At the heart of this assembly is the proven Walbro 255lph pump, selected to support LS engines up to 550 horsepower under heavy load. Its high-flow design prevents pressure drop during rapid throttle changes, eliminating lean spots that can stress injectors and engine components. Tight internal tolerances and a self priming rotor enable fast system fill after shutdown, reducing crank time on cold starts. Rugged construction resists wear from ethanol blends, so you can expect extended service intervals even with today's fuel formulations.
Direct Fitment for GM G-Body Tanks Simplifies Installation
This EFI sending unit and in-tank pump kit mirrors the factory GM flange and O-ring pattern for direct compatibility with Grand National, Monte Carlo, Cutlass and G8 tanks. Only a handful of pilot holes are needed to secure the assembly, so you avoid cutting custom openings or welding. By reusing original mounting points and hardware, installers preserve tank integrity and the stock appearance. The straightforward swap process means you can upgrade to modern EFI capability in just a few hours without complex frame modifications.
Count on precise fuel management and reliable operation; for this related FLT product see our Fuel Fitting Kit for G-Body.