EFI Fuel Tank Kit 400 LPH Pump for 1958 Chevy Impala LS and LT Swaps
If you're swapping LS or LT power into a 1958 Chevy Impala the factory tank frame mounts can be a tight fit and the 1958 Impala EFI Fuel Tank Kit 400 LPH Pump is your solution for consistent fuel delivery under high load conditions. This kit installs directly to original B-Body frame points without trimming or drilling and retains the stock filler neck position to preserve ground clearance while keeping line runs tidy. Internal pump placement immerses the Walbro unit in fuel for natural cooling that limits heat soak and muffles operational noise during spirited drives. You also get a calibrated sending unit vent filter and all mounting hardware for both stock and aftermarket EFI regulators and the entire assembly undergoes leak testing under strict quality standards to support setups up to 550 hp.
Precise Mounting for 1958 Impala Chassis
This kit bolts directly to original B-Body frame points on 1958 Impala, Bel Air, Biscayne, and Del Ray models without any trimming or drilling. By preserving the stock filler neck position, it maintains underbody clearance and keeps fuel and electrical lines neat along the factory routing. Installers can skip test fits and adapter fabrication, reducing overall install time and minimizing the risk of harness chafe or interference with suspension components. Such accuracy in fitment ensures that the tank assembly sits exactly where the factory unit once did, delivering a seamless integration that complements the classic undercarriage layout.
In Tank Pump Cooling and Noise Control
Housing the 400 LPH Walbro pump entirely inside the fuel tank immerses it in liquid for continuous thermal management, limiting heat soak that can reduce pump life. Fuel surrounding the module also acts as a sound dampener, muffling operational noise that can otherwise echo in the cabin during spirited acceleration. This arrangement guarantees consistent flow rates even under demanding cornering forces or sustained high-load conditions up to 550 hp. Drivers benefit from stable fuel pressure and immediate throttle response, with minimal risk of vapor lock or performance drop-off when pushing the engine's limits.
Integrated EFI Components for Streamlined Installation
Everything needed for a complete EFI delivery system arrives in one box, including a calibrated sending unit, vent filter, tank straps, gaskets, filler neck, and all mounting hardware. Pre-engineered connections simplify the attachment of modern EFI regulators and mating to stock or aftermarket fuel lines. The vent filter captures airborne moisture and debris before it reaches sensitive sensors, helping to preserve pump and regulator life. This level of integration not only cuts out multiple parts runs but also results in tidy underbody routing and a professional finish that stands up to inspection.
American Construction Ensuring Enduring Reliability
Every tank undergoes precise welding and leak testing in the United States to meet strict quality standards. The corrosion-resistant shell is formulated to withstand ethanol-blended fuels and a wide range of temperatures, protecting against pitting and degradation over time. Critical hardware including straps and clamps is inspected for consistency, ensuring the assembly can endure vibration and load changes without loosening. With this level of American craftsmanship and attention to detail, the kit offers dependable fuel support for high-output LS and LT swaps across many seasons of driving.
Built to strict quality standards this kit delivers consistent flow under load and for a Smaller capacity fuel pump Kit at 255 LPH see our 1958 Impala EFI Fuel Tank Kit - 255 LPH Pump.