1978-1980 Oldsmobile Cutlass LS EFI Fuel Tank Kit with 255 LPH Pump
Swapping an LS powerplant into a 1978 through 1980 Cutlass Notchback often exposes the stock fuel system as a weak link, and this EFI fuel tank kit with a 255 LPH pump provides a reliable high volume supply to support up to 550 horsepower. By reusing the original steel tank and mounting directly to factory points the kit preserves underbody appearance and requires no cutting or welding. Precision components such as vent filters and durable gaskets ensure a secure seal and simplify service access. This solution maintains steady fuel pressure through rapid throttle transitions or under sustained boost so builders can focus on tuning the LS swap instead of troubleshooting fuel starvation.
Precision Fitment for 1978 to 1980 Oldsmobile Cutlass Underbody
Adapting modern EFI hardware to a classic Cutlass frame demands exact alignment of every connection point. This kit retains the original steel tank and uses precision machined filler neck and vent filter brackets that follow the contours of the factory floor pan. By bolting directly into the stock mounting points, it removes any need for cutting, welding or custom spacers, preserving the vehicle's underbody appearance. The engineered tank straps are sized to maintain proper tension and resist sagging even when the tank is full. Installers benefit from a component fit that eliminates trial and error, allowing more time to focus on tuning the LS swap. Overall, this approach ensures a clean integration that honors the original chassis design.
Corrosion Resistant In Tank Module with Service Friendly Access
At the heart of the assembly lies a treated in tank module that combines the 255 LPH Walbro pump, sending unit and pre filter into a single housing built to resist chemical additives and moisture. The corrosion resistant finish on the module prevents premature wear in street or competition environments. Internal vibration control features safeguard pump wiring and seals against harmonic stresses, while gaskets and hardware deliver reliable sealing under repeated cycles of filling and draining. A removable cover plate and quick disconnect fittings simplify module removal when service is required, cutting maintenance time dramatically. This design choice prioritizes longevity and keeps the system ready for rapid inspection or component replacement.
255 LPH Walbro Pump Calibrated for Sustained 550 Horsepower Operation
The matched 255 LPH Walbro pump is selected to deliver a constant fuel supply for LS engines producing up to 550 horsepower. Consistent pump output prevents lean fuel mixtures that can lead to detonation or hesitation under rapid throttle changes. By working with strategically positioned vent filters, the system manages vapor separation and helps avoid air lock conditions that could interrupt performance. Drivers will notice smoother acceleration and a stable fuel pressure curve even during hard launches or sustained boost. This precise calibration ensures the engine always receives the volume it demands, whether cruising on the highway or tapping into the top of the rev range.
Streamlined Bolt In Installation Preserving Factory Features
This fuel tank kit arrives ready to install with all required components, including tank straps, filler neck, vent filter, gaskets and mounting hardware. Installers follow a clear sequence: remove the factory pump module, lower the tank, drop in the new in tank assembly, connect fuel lines and wiring harness, and secure everything using the original strap locations. Because no drilling or fabrication is necessary, build time is reduced and the potential for alignment errors is minimized. The plug and play harness eliminates splicing, while included gaskets ensure a leak free seal from day one. With all critical parts supplied in one kit, builders gain efficiency and confidence in their LS conversion project.
Trust in the precise fit and consistent fuel flow. For a Larger capacity fuel pump Kit at 400 LPH see our 1978-1980 Cutlass Notchback EFI Fuel Tank Kit - 400 LPH Pump.