LS EFI Fuel Tank Kit for 1978-1988 Chevy Monte Carlo/Malibu/Grand Prix
Your G-Body LS swap demands a fuel system that can keep pace with high engine output and firm throttle response during spirited runs. This kit replaces the stock tank with an assembly engineered for 1978-88 Monte Carlo, Malibu and Grand Prix frames, hosting a Walbro in-tank module that delivers 255 LPH of cool, consistent flow when fully submerged, minimizing heat soak and preventing vapor formation even under 550 horsepower loads. Installation uses the original mounting points along with provided straps, gaskets and filler neck so no cutting or welding is required and the integrated sending unit ties directly into the factory gauge cluster for reliable level readings.
Precision Submerged Pump Placement for Consistent Fuel Flow
This fuel tank kit positions the Walbro 255 LPH pump fully immersed below the fuel level to maintain a cool inlet temperature and eliminate vapor formation under heavy load. By keeping the pump submerged, heat soak is minimized and intermittent air pockets are prevented during hard acceleration or tight cornering. Internal tubing and a fine mesh vent filter work together to sustain a stable flow rate when supporting up to 550 hp, and the preassembled module aligns precisely with the tank opening for error-free service.
Direct Bolt In Integration for G Body Fitment
Engineered for 1978-88 Monte Carlo, Malibu and Grand Prix frames, this assembly uses the original mounting points along with supplied straps, gaskets and a matching filler neck for a true bolt-in swap. No cutting, welding or frame alteration is required, so chassis geometry and underbody clearance remain as designed. Installers can complete the retrofit using basic hand tools, following a clear step-by-step procedure that preserves factory fuel line routing and vent plumbing.
American Steel Tank Durability for LS Swap Demands
The replacement tank is built in the USA from heavy gauge steel selected for its resistance to corrosion and vibration fatigue. Precision-formed weld seams withstand the dynamic loads and torque pulses generated by a high-output LS engine and chassis flex on street or track. A durable external finish guards against road debris and moisture intrusion, ensuring that the integrity of the shell and seams is maintained even when supporting builds up to 550 hp over thousands of miles.
Integrated Sending Unit for Accurate Level Feedback
The included sending module features a calibrated float arm tailored to the tank’s internal geometry, delivering precise fuel level readings to the original dash gauge without adapters. Factory-style connectors lock securely to prevent signal dropout under vibration, while corrosion-resistant materials ensure long-term reliability in fuel vapor environments. This direct fit solution preserves dash authenticity and gives the driver confidence in remaining range during spirited driving or extended touring.
Built to handle up to 550 horsepower with unwavering consistency. To support higher flow requirements select our Larger capacity fuel pump Kit at 400 LPH via 1978-1988 Monte Carlo 400 LPH pump Tank Kit.