1965-1966 Impala/Caprice EFI Fuel Tank Kit for LS Swaps with 400 LPH Pump
Swapping an LS engine into a 1965 or 1966 Impala demands a fuel setup that blends modern flow capacity with vintage fitment and the 1965-1966 Impala EFI Fuel Tank Kit - 400 LPH Pump answers that call. Its integrated pump module installs cleanly within the tank cavity to preserve the Impala's original undercarriage lines. The Walbro 400 LPH unit sustains consistent flow for engines pushing beyond 550 horsepower and the complete kit arrives with sender, straps, vent filter and all hardware for a straightforward installation. Durable construction keeps fuel delivery reliable while maintaining factory tank styling.
Seamless Integration with Factory Tank Cavity
The in-tank pump module is engineered to fit precisely within the 1965-1966 Impala's original fuel tank cavity, preserving the classic underbody profile without alterations to the frame. By occupying the stock mounting location, the module sits flush with the existing floorpan, maintaining a clean appearance and eliminating the need for external pump brackets or wiring runs. This seamless integration not only enhances undercarriage aesthetics but also optimizes fuel pickup by positioning the pump at the ideal depth within the tank.
Consistent 400 LPH Flow for Engines Exceeding 550 Horsepower
The Walbro 400 LPH pump delivers a steady stream of fuel capable of supporting LS engines well above 550 hp, including supercharged and turbocharged setups. Its robust design maintains stable pressure under sustained high?rpm conditions, reducing the chance of fuel starvation during heavy acceleration or track use. This reliable flow profile helps prevent lean spots, safeguard internal engine components, and ensure performance remains consistent from street cruising to spirited driving.
Durable Materials Preserve Vintage Style
Constructed from corrosion-resistant metals and precision-cut components, the fuel tank kit withstands harsh environments while retaining the Impala's original tank outline. High-quality gaskets and seals guard against leaks and noise, providing a quiet, rattle-free ride. The finish mimics factory textures, so even upon close inspection the installation appears as a stock unit, marrying modern endurance with period-correct styling.
Comprehensive Kit Simplifies Swap Installation
This complete package includes the pump module, sending unit, filler neck, vent filter, tank straps, gaskets, and all necessary hardware, eliminating the need for aftermarket sourcing. Clear alignment tabs and pre-drilled mounting points accelerate the fitment process, letting technicians or home builders complete the LS conversion without specialty tools or fabrication work. The result is a straightforward installation that returns your Impala to the road quickly and reliably.
For a smaller capacity fuel pump kit at 255 LPH consider our 1965-1966 Impala EFI Fuel Tank Kit - 255 LPH Pump to complete your fuel setup with confidence.