1978-1980 Oldsmobile Cutlass Notchback Fuel Tank Kit for LS EFI Systems with 255 LPH Pump
For builders fitting a modern LS EFI setup into a 1978 to 1980 Oldsmobile Cutlass Notchback, the Cutlass Notchback EFI Fuel Tank Kit with 255 LPH Pump tackles the factory tank's limited delivery and fuel starvation risk under load. This kit retains the original steel container and matches OE mounting points for a bolt-in installation that preserves the car's underbody profile. Precision machined vent filters and durable gaskets maintain a tight seal around the filler neck and guard against vapor loss. At its heart, the 255 LPH Walbro pump ensures consistent flow to support engines up to 550 hp without lean spots under boost or rapid throttle transitions.
Durable In Tank Module Assembly
The integrated tank module houses the 255 LPH Walbro pump, sending unit and prefilter in a single corrosion resistant housing treated to withstand ethanol blends and road moisture. Internal vibration mounts isolate wiring and seals from engine harmonics, reducing the risk of premature wear or connection failures. By uniting these components into one removable assembly, routine inspection and service tasks become far less complex for builders. A quick access cover plate and tool free disconnect fittings offer technicians immediate entry to pump and filter elements without disturbing the tank strap alignment. This level of modular design enhances reliability and shortens maintenance intervals on the street or the track.
Precision Sealing with Machined Vent Filters and Gaskets
Each vent filter is precision machined to match the original filler neck contours, ensuring a tight seal that keeps dirt and debris out while controlling vapor release. High quality elastomer gaskets maintain consistent compression over repeated filling cycles and temperature swings, preventing fuel vapors from escaping. By retaining the factory tank geometry, these parts lock into place without custom shims or adjustments, preserving the underbody appearance of the vehicle. This approach not only safeguards the fuel system from contamination but also supports emissions requirements by minimizing evaporative loss in varied driving conditions.
Consistent Fuel Flow for 550 Horsepower LS Engines
The calibrated pump flow rate sustains steady pressure under rapid throttle changes and high load situations, eliminating the lean spots that can threaten performance and engine health. By supplying up to 255 liters per hour, the module reliably supports LS engines with output levels as high as 550 horsepower, even when running forced induction. The balanced rotor and efficient motor design reduce operating temperature and noise signature, contributing to quieter operation during extended high demand cycles. Optimized internal passages help prevent air lock and maintain continuous flow, delivering smooth driver feedback at all RPM ranges.
Straightforward Bolt In Installation Process
This kit attaches directly to the factory tank straps and frame brackets with no cutting, welding or drilling required, enabling a true bolt in fit that saves hours of fabrication. A plug and play wiring harness connects pump, sending unit and ground without splicing, ensuring correct polarity and rapid diagnostics. All necessary hardware-tanks straps, filler neck, mounting bolts and sealing components-is included in one consolidated package to simplify inventory management. The retained steel tank shell maintains the classic undercarriage profile and aligns with factory inspection plates, allowing installers to focus on tuning rather than fuel system integration.
Trust MuscleRods engineering and for a Larger capacity fuel pump Kit at 400 LPH see our 1978-1980 Cutlass Notchback EFI Fuel Tank Kit - 400 LPH Pump.