1978-1988 Monte Carlo Malibu Grand Prix EFI Fuel Tank Kit for LS and LT Swaps
This EFI Fuel Tank Kit fits 1978 through 1988 Monte Carlo, Malibu and Grand Prix G-Body models and addresses the common challenge of fueling LS and LT engine conversions with an in-tank 400 LPH Walbro pump assembly. Tailored specifically for G-Body chassis, it includes a sending unit, filler neck and all necessary hardware to integrate cleanly with existing fuel lines. Built to support high output EFI applications, the tank maintains stable flow under varied driving conditions and reduces the chance of vapor lock. Each part is made in the USA, ensuring consistent quality for both daily driving and weekend track outings.
Precision Fitment for 1978-1988 G Body Models
This fuel tank kit is engineered to match the stock mounting points on Monte Carlo, Malibu and Grand Prix chassis from 1978 through 1988. Precision stamped flanges and factory-style baffles ensure the tank seats flush against the frame rails without trimming or fabrication. By mirroring the original geometry, it maintains proper clearance under the vehicle and aligns seamlessly with existing fuel lines and vent hoses. Installers benefit from a plug-and-play experience that preserves the car's ground clearance and suspension travel.
Integrated Fuel Pump Module with Stable Flow
At the heart of the system is a 400 LPH Walbro pump enclosed in a sealed standpipe, guaranteeing a constant supply of fuel even under heavy acceleration. Housing the pump inside the tank minimizes heat soak and air ingestion, two common causes of vapor lock in high-output applications. The standpipe isolates the pickup from sloshing fuel, delivering smooth throttle response through hard launches and cornering. Whether running an LS or LT engine, this internal arrangement ensures the precise volume needed for strong, reliable performance.
Self-contained EFI Conversion Simplification
Every component required for a complete EFI swap arrives with the kit, including the pump assembly, sending unit, filler neck and a full set of gaskets and mounting hardware. This all-in-one approach removes the need to source multiple parts and adaptors, cutting hours off installation time. Detailed instructions guide installers through each step, reducing the risk of leaks or incorrect fittings. With a ready-to-go package, enthusiasts can spend less time hunting parts and more time enjoying their upgraded ride.
Built for consistent flow and secure fitment. To match a smaller capacity fuel pump Kit at 255 LPH consider our 1978-1988 Monte Carlo 255 LPH pump Tank Kit.