1965-1966 Chevy Impala and Caprice LS EFI Fuel Tank Kit
Whether you're facing fuel starvation under load in your Impala or Caprice or seeking to preserve that classic B Body underbody look this kit addresses both with an integrated module designed to slide into the factory tank cavity. Its self contained assembly aligns with factory mounting points to eliminate extra brackets and installs without cutting or welding on your B Body shell. At its core the 400 LPH pump provides steady flow to support LS engine demands over 550 horsepower and resists ethanol corrosion for dependable pressure during hard cornering and wide open throttle runs. Installation kits include gaskets, straps and a replacement filler neck to reduce bench time and maintain the original look beneath the chassis.
Factory Cavity Integration for a Seamless Fit
The fuel pump module installs directly into the original tank cavity of 1965 and 1966 Impala and Caprice bodies, maintaining the factory underbody profile without any cutting or welding on the steel shell. By matching the stock mounting points, the assembly requires no extra brackets and preserves the exact road clearance designed by Chevrolet engineers. The pump sits at an optimized depth within the tank interior, ensuring reliable pickup during hard cornering, spirited acceleration and prolonged cornering loads. Integrating the module inside the existing cavity also keeps corrosion protection intact, since the original welds and steel finish remain undisturbed. Serviceability is enhanced because the design follows the OEM tank geometry and alignment cues, reducing installation errors and preserving resale value of the classic B Body.
Consistent 400 LPH Flow for High Output LS Engine Setups
At the heart of the system is a 400 liter per hour Walbro pump engineered to support more than 550 horsepower on LS engine conversions. Its internal rotor and stator design maintain a narrow pressure band that simplifies calibration of external regulators and keeps the fuel rail pressure stable during wide open throttle bursts. The pump housing resists ethanol corrosion, ensuring long service life when running modern blends, and its compact size allows it to nestle securely inside the restored cavity. Drivers benefit from smooth throttle transitions and dependable fuel delivery under sustained high rpm or forced induction scenarios. Consistent flow reduces the risk of lean conditions that can lead to detonation, safeguarding expensive engine components during track sessions or spirited street runs.
Complete Hardware Package to Streamline Installation
This all inclusive kit arrives with every component needed to upgrade the stock fuel system on a 1965 or 1966 B Body, eliminating the need to source parts from multiple vendors and reducing bench time. Alongside the pump and module, the package includes a matched sending unit to preserve accurate gauge readings, a replacement filler neck styled like the factory part, a vent filter to protect against contaminants, heavy duty tank straps and precision gaskets. Predrilled attachment tabs and clear alignment markers guide even novice installers through each assembly step, while zinc plated bolts and brackets resist corrosion beneath the chassis. The result is a professional quality installation that retains classic underbody aesthetics and delivers modern fuel delivery performance with minimal effort.
Complete your fuel system upgrade with the 1965-1966 Impala EFI Fuel Tank Kit - 255 LPH Pump as a smaller capacity fuel pump kit at 255 LPH for reliable fitment and steady fuel delivery.