1981-1988 Oldsmobile Cutlass LS and LT EFI Fuel Tank Kit with 400 LPH Pump
When adapting LS or LT powerplants to a first generation Oldsmobile Cutlass, maintaining consistent fuel delivery can make or break the swap. This EFI fuel tank kit pairs a custom formed reservoir with a 400 LPH Walbro pump to support builds up to 550 hp without risking fuel starvation under high rpm or sustained cornering. Its internal shape and pump mounting location reduce turbulence and prevent vapor lock during spirited driving on street or track. Complete with factory style sending unit, filler neck, straps and mounting hardware that align with the Cutlass body without modification, the kit simplifies installation and lets installers focus on tuning instead of tank fabrication.
Optimized Reservoir Contour for Uninterrupted Fuel Flow
The tank's internal reservoir shape has been engineered to keep the pump submerged under all driving conditions. By guiding fuel toward the inlet during hard cornering or rapid acceleration, this design prevents air pockets from forming around the pump module. As lateral forces shift the liquid, fuel is directed into the pickup area so pressure remains constant and vapor lock is avoided. This contour also promotes uniform heat distribution, reducing the risk of pressure drop during extended highway runs or spirited street use. The result is a stable supply that lets the EFI system maintain precise mixture control without hesitation.
400 LPH Walbro Pump Performance Under High Demand
The included Walbro pump delivers up to 400 liters per hour to support engine builds beyond 550 hp, including supercharged configurations. It sustains required pressure at elevated rpm and under sudden throttle openings, eliminating the lag that can lead to lean conditions. This capacity is crucial for modern LS and LT injection systems that rely on steady flow to prevent detonation and maintain safe combustion. In sustained full throttle scenarios, the pump's consistent output ensures throttle response remains sharp. Built into the module, it also reduces installation complexity by combining pump and filter in one assembly.
Direct Fitment With Factory Alignment Points
Every dimension of the tank matches the 1981-1988 Cutlass frame rails and mounting brackets, allowing installers to reuse original attachment points without modification. CAD guided forming positions the filler neck in perfect alignment with the body opening, while integrated vents clear surrounding suspension links and exhaust components. Steel straps mirror factory thickness to preserve underbody ground clearance and chassis rigidity. By avoiding adapters or custom fabrication, installers can maintain chassis integrity and complete the swap more efficiently, cutting time spent on trial fits and adjustments.
Comprehensive Hardware Selection for Streamlined Assembly
This kit delivers all necessary elements for a hassle free installation, from the in-tank pump module and calibrated sending unit to straps, filler neck, vent filter, molded gaskets and stainless mounting hardware. The sending unit arrives pre calibrated for electronic fuel gauges, ensuring accurate level readings with no additional setup. Gaskets and seals are molded to match OEM contours, preventing leaks and ensuring proper venting under pressure. By bundling every component, the kit eliminates sourcing delays and simplifies project logistics, letting installers focus on tuning rather than parts gathering.
Count on MuscleRods for precise fitment and consistent performance in your Cutlass swap. For a smaller capacity fuel pump kit at 255 LPH consider our 1981-1988 Olds Cutlass EFI Fuel Tank Kit - 255 LPH Pump.