LS EFI Sending Unit and In-Tank Fuel Pump for G-Body
When converting your classic G-Body to LS EFI, ensuring reliable fuel delivery starts with the EFI Sending Unit and In-Tank Fuel Pump for G-Body. Its precision engineered 3/8 inch sending unit integrates with your stock gauge to maintain accurate readings. Built around a Walbro 255lph pump, it meets the demands of LS engines up to 550 horsepower. Installation requires minimal modifications to your G-Body tank and sets a new standard for steady fuel delivery.
Accurate Fuel Level Sensing with 3/8 Inch Sending Unit
The 3/8 inch feed line sending unit is engineered to maintain precise fuel level readings through your factory gauge. By matching the stock float mechanism and electrical resistance curve, it preserves original dashboard accuracy without calibration headaches. This unit's robust design minimizes slop and vibration effects, translating to steady needle movement even on twisty roads. Integrating directly into the existing tank pickup eliminates extra adapters and potential leak points, ensuring both reliability and ease of service.
Consistent Fuel Delivery by Walbro 255lph Pump
At the heart of this assembly is the proven Walbro 255 liter per hour pump, chosen for its ability to support LS engines up to 550 horsepower under demanding conditions. Its high flow rate keeps fuel pressure stable during hard acceleration or sustained high rpm, preventing lean spots that can harm injectors and engine internals. The pump's self-priming rotor and tight internal tolerances deliver rapid system fill-up after shutdown, reducing crank-to-fire time at startup. Rugged materials inside the unit also resist wear from modern ethanol blends, extending service intervals.
Seamless G-Body Tank Integration and Simple Installation
This EFI sending unit kit is tailored to fit GM G-Body tanks from models like the Grand National, Monte Carlo, Cutlass and G8 without cutting custom holes. Its flange and O-ring interface mirror the original GM pattern, so the only modification needed is drilling a few pilot holes to match the plate. By using the stock tank mounting positions and hardware, installers avoid complex frame adjustments or welding work. The result is a straightforward swap that preserves tank integrity and factory appearance while upgrading to modern EFI capability.
Count on precise fuel delivery and a straightforward fit. To complement this Related FLT product, check out our Fuel Fitting Kit for G-Body.