1964-1967 Oldsmobile Cutlass EFI Fuel Tank Kit for LS Swap
When fitting an LS into a first generation Cutlass, securing a steady fuel feed is critical and this Cutlass EFI fuel tank kit with a 255 LPH pump is engineered to maintain constant pressure under sudden throttle changes. Designed around the factory trunk mounts, this assembly slides into the stock cavity without altering body panels or frame rails. With a US made Walbro unit, the 255 LPH pump remains submerged for consistent output and the OEM style sender delivers precise fuel level readings on the dash. A built in vent filter and properly sized filler neck balance internal pressure to prevent vacuum lock during spirited cornering.
Premium American Craftsmanship in Fuel Tank Assembly
This EFI fuel tank kit is assembled in the United States, reflecting meticulous attention to detail at every stage. Each tank shell undergoes precision forming and weld inspection to ensure a seamless finish that resists vibration and maintains structural integrity under load. The use of premium materials and a purpose-built bracket system guarantees that the assembly will align accurately with the factory mounting points, eliminating the need for post-order modifications. Quality control checks on the Walbro pump integration and sender calibration further safeguard against premature wear or inconsistency. The result is a durable assembly that upholds classic Cutlass underbody aesthetics while delivering reliable service throughout the life of the swap.
Balanced Fuel Delivery Enhancing Performance and Efficiency
Locating the pump inside the tank immerses it in fuel to maintain stable pressure even during spirited acceleration or tight cornering. By running at a steady output of 255 liters per hour, the Walbro unit meets the demands of an LS engine up to 550 horsepower without pressure fluctuations or cavitation. Consistent flow ensures that injector pulse width remains accurate, translating directly into crisp throttle response and smooth power delivery. In everyday driving, this steadiness reduces wasted cycles from rapid pump cycling, which can improve overall fuel economy and lengthen pump life. Drivers experience confident acceleration, knowing the system will deliver the volume required in all conditions.
Modular Kit Components Streamlining Maintenance and Upgrades
The kit arrives with all necessary pieces organized for a straightforward installation and future service. A combined pump and sender module can be removed as a single unit, so routine checks or replacement of the precision level sender arm take minutes rather than hours. The filler neck, vent filter and gaskets are pre-sized to fit the Cutlass trunk opening, and the hardware pack includes straps and seal rings for a leak-free fit. If upgrading to a higher volume pump or a different sender profile is desired, the modular layout lets technicians swap only the required parts. This design minimizes downtime and keeps the classic chassis well preserved.
Count on consistent fuel delivery through every throttle change for lasting confidence. To upgrade to a Larger capacity fuel pump Kit at 400 LPH consider our 1964-1967 Cutlass EFI Fuel Tank Kit - 400 LPH Pump.