1978-1988 LS Fuel Tank Kit for G-Body Monte Carlo/Malibu/Grand Prix
When fitting an LS engine into a 1978 to 1988 Monte Carlo, Malibu or Grand Prix, reliable fuel delivery is critical and this EFI fuel tank kit solves that by mounting a 255 LPH Walbro pump in the original chassis location. It maintains steady flow for power levels up to 550 hp while the integrated sending unit delivers precise gauge readings through the stock instrument cluster. Installation follows the factory mounting points with supplied straps, gaskets and filler neck to preserve underbody clearance and save time on labor. The USA made construction ensures metal and seal materials resist corrosion and vibration for dependable service in any driving condition.
Thermal Management and Steady Fuel Delivery
The in-tank placement of the 255 LPH Walbro pump ensures continuous immersion in fuel to shed heat and prevent performance drop-off under heavy load. By avoiding external mounting, this design eliminates air ingestion during hard acceleration or cornering and maintains consistent pressure for engines up to 550 hp. Tuned flow passages and a fine-mesh vent filter further stabilize delivery across the rev range, translating directly to sharper throttle response and reliable operation in spirited driving.
Seamless Installation with Factory Mount Points
This kit drops directly into the original mounting locations on 1978–1988 Monte Carlo, Malibu and Grand Prix chassis, using supplied straps, gaskets and filler neck to preserve underbody geometry. Installers bypass custom brackets and frame alterations, saving labor time while retaining stock suspension and exhaust clearances. The result is a straightforward bolt in setup that mirrors factory fitment while delivering modern injection performance.
Accurate Gauge Performance with Integrated Sending Unit
An integrated sending unit with calibrated float arm feeds exact fuel level data through the stock instrument cluster, removing the need for aftermarket gauges. Robust connectors guard against vibration and corrosion to maintain repeatable readings during daily driving and track sessions alike. Retaining the factory output signal gives drivers familiar feedback on range, instilling confidence on long road trips.
American Craftsmanship for Lasting Durability
All kit components are manufactured in the USA under rigorous quality control to withstand road debris, heat and engine vibration. Tank straps formed from corrosion resistant alloy pair with a fuel-safe module housing that resists deformation and leaks. Carefully selected gaskets and hardware endure repeated thermal cycling and fuel exposure, delivering dependable service for both daily commutes and high-demand builds.
Keep your LS project on steady flow. For a larger capacity fuel pump Kit at 400 LPH see our 1978-1988 Monte Carlo 400 LPH pump Tank Kit.