LS EFI Fuel Tank Kit for 1981-1988 G-Body Oldsmobile Cutlass
When fitting an LS engine into a 1981 through 1988 Oldsmobile Cutlass G Body, consistent fuel delivery depends on a purpose built tank and pump assembly. The Walbro 255 LPH pump and sending unit arrive as a single module that mates to factory tank flange and straps without any fabrication. Steel tank, straps and hardware resist corrosion whether the car is a street cruiser or is used on track while supporting fuel flows for engines up to 550 horsepower. With filler neck, vent filter, gaskets and all mounting hardware included, installation moves quickly so builders spend less time sourcing parts and more time tuning engine performance.
Optimized Fuel Flow Dynamics Inside the Tank
The integrated in-tank pump and sending unit form a single module designed to minimize internal turbulence and maintain steady pressure under rapid throttle changes or sustained high RPM. By housing both components within the fuel reservoir, the system reduces the number of fittings and potential leak points, ensuring smooth and consistent delivery to the injectors. This stability is critical for precise fuel mapping, as fluctuations in flow can lead to lean or rich conditions that compromise performance and efficiency. The Walbro 255 LPH pump is calibrated for up to 550 horsepower, ensuring that even heavily tuned LS engines receive the volume of fuel they demand without interruption. With internal pressure swings controlled, drivers experience crisp throttle response whether cruising or on the track.
Accurate Chassis Integration for G Body Frames
The tank and bracket assembly are engineered to align perfectly with the original mounting points of 1981 through 1988 Oldsmobile Cutlass G Body frames, eliminating the need for custom fabrication or improvised supports. The filler neck and vent filter positions match the stock locations, preserving factory routing for fuel lines and vent hoses. This direct approach not only accelerates installation but also reduces the risk of stress on lines or misalignment that could lead to premature wear. Technicians benefit from a bolt in installation that mirrors factory tolerances, yielding reliable sealing integrity and avoiding the trial and error often encountered with universal fit solutions. As a result, shop time is cut dramatically and the system performs with the dependability of original equipment.
Robust Corrosion Resistance Under Varying Conditions
Every visible component-including the fuel tank shell, straps, and mounting hardware-utilizes steel alloys selected for their inherent resistance to rust and mechanical fatigue. These materials maintain structural integrity even when exposed to moisture, road salt, or extended periods of storage. Premium gaskets and seals complement the metal parts by delivering leak free joints and coping with constant thermal cycling and vibration. Whether the vehicle sees daily commuting or high stress track sessions, this assembly resists degradation that could otherwise lead to fuel leaks or structural failure. Long term durability translates to fewer service intervals and sustained confidence in fuel containment.
Streamlined Assembly with Complete Component Matching
This comprehensive kit brings together the 255 LPH fuel pump, in-tank module, precision sending unit, tank straps, filler neck, vent filter, gaskets, and all necessary hardware in a single package. Each part is engineered for seamless compatibility, removing the guesswork of part sourcing and fit verification. Installers avoid scanning multiple suppliers for matching fittings, since every component is designed to work in concert from the moment it arrives in the shop. The result is a unified system that can be installed in a fraction of the usual time, allowing builders to shift focus from parts procurement to tuning and testing the LS powerplant itself. By consolidating essential items, the kit delivers a turnkey solution for fuel delivery in G Body swaps.
Count on MuscleRods for reliable fuel delivery under all conditions. To complement this setup with a larger capacity fuel pump Kit at 400 LPH see our 1981-1988 Olds Cutlass 400 LPH Pump Tank Kit.