1963-1967 Chevy Corvette LS EFI Fuel Tank Kit with 400 LPH Pump
Installing an LS powerplant in a 1963 to 1967 Corvette demands unwavering fuel delivery under high rpm and boost conditions, and the 1963 to 1967 Corvette EFI Fuel Tank Kit with 400 LPH Pump delivers exactly that. It integrates a Walbro pump inside the tank module to keep flow stable during prolonged hard driving, recirculates excess return fuel to reduce operating temperatures and resists ethanol blends for durable service. Designed for the Y Body chassis, the direct fit assembly uses factory strap locations and includes gaskets and hardware for straightforward installation without chassis changes, while a calibrated sending unit provides precision fuel level monitoring through cornering forces and vibration.
In Tank Pump Module for Sustained Power Delivery
The in-tank module houses a 400 LPH Walbro pump to meet the peak demands of an LS engine under sustained high-rpm and boost conditions. By recirculating unused fuel back into the tank, this design lowers operating temperature on the pump motor and mitigates heat-related wear over extended track or street sessions. Positioning the pump inside the fuel cell also dampens noise and shields it from external temperature swings, ensuring steady pressure regardless of ambient conditions. This internal arrangement prevents lean spikes that can damage engine components when output is pushed beyond stock levels. The assembly's internal mounting ring holds the pump securely, reducing vibration and extending service life. Overall, this configuration delivers consistent flow above 400 LPH even under heavy loads.
Precision Sending Unit Ensuring Reliable Fuel Level Data
This kit features a sending unit engineered with a pivot arm and precision resistor track to deliver accurate readings through lateral acceleration and chassis vibration. The float design compensates for slosh during cornering, maintaining signal stability so the gauge does not swing wildly when fuel moves in the tank. Consistent level data helps the driver plan refuels and avoid unexpected dry-run shutdowns in high-output applications. Integration with stock wiring and dashboard systems is seamless, requiring no additional modules or calibration steps. The unit's internal bearings and sealed feedthrough protect the electrical contacts from corrosion, delivering long-term reliability. This level of precision becomes critical when running supercharged or 550+ hp LS setups that consume fuel at elevated rates.
Tank Assembly Designed for Direct Fit in 1963 to 1967 Corvette
Every dimension of the tank housing aligns with the original strap mounting points on the Y-Body chassis, eliminating the need for cutting or welding. Included straps, gaskets, and mounting hardware secure the unit with factory-spec torque values, yielding a leak-free seal from day one. The drop-in filler neck and vent filter snap into place, maintaining correct breather operation and preserving underbody clearance. Technicians can complete installation with standard hand tools in a few hours, avoiding fabrication delays and preserving the stock suspension geometry. The direct fit design also streamlines alignment of the fuel lines and electrical harness, reducing installation errors. This turnkey solution keeps the frame rail and floor pan untouched, maintaining original chassis integrity.
Ethanol Resistant Construction for Durable Operation
Manufactured in the USA from corrosion-resistant materials, the tank shell and internal components are formulated to withstand modern ethanol blends without degradation. Premium seals resist swelling and loss of sealing force over time, preventing leaks that could arise from chemical attack. Connector grommets are sized to maintain proper tightness through thermal cycling and fuel vapor exposure, guarding against seepage at the wiring junction. By selecting these specific alloys and elastomers, the assembly endures moisture and solvent entrainment that can compromise lesser systems. Rigorous quality control ensures each tank meets or exceeds OEM standards for ethanol compatibility. The result is a fuel delivery system ready for hard use mile after mile in any climate.
For moderate output LS setups consider the Smaller capacity fuel pump Kit at 255 LPH with our 1963-1967 Corvette EFI Fuel Tank Kit - 255 LPH Pump.