1970-1972 Oldsmobile Cutlass EFI Fuel Tank Kit 400 LPH Pump for LS and LT Engines
Installing an LS or LT powerplant into a 1970 to 1972 Cutlass A body chassis demands a fuel system that stands up to hard cornering and heavy acceleration. The 1970 to 1972 Cutlass EFI Fuel Tank Kit 400 LPH Pump features a baffled interior paired with a premium in tank module to maintain consistent pressure in 550 plus horsepower setups. A body matched shell preserves original ground clearance without cutting or welding and nests precisely on factory frame rails. Complete hardware including straps, gaskets and fill neck plus clear instructions ensure a secure seal and straightforward underbody installation.
Precision Fit for 1970 to 1972 Cutlass Frame Rails
The fuel tank shell is engineered to follow the contours of 1970 to 1972 Cutlass A-Body frame rails with exacting accuracy, preserving original ground clearance and ride height. This precision fit eliminates the need for cutting or welding, ensuring that structural integrity remains intact while saving hours during installation. The design also aligns OE mounting points for seamless integration of straps, gaskets and fasteners so installers experience minimal trial and error. By nesting perfectly under the chassis, the tank avoids interference with exhaust components, brake lines and suspension linkages, keeping all moving parts clear. For builders focused on authenticity and reliability, this tailored match maintains factory dimensions while accommodating modern LS and LT powerplants.
Advanced Baffle System for Stable Fuel Supply
An internal network of baffling divides the tank into isolated chambers to drastically reduce slosh during hard cornering, acceleration or sudden stops. By keeping the pickup port submerged at all times, the system prevents fuel starvation events that can cause lean spikes under load. This stability is critical for engines tuned beyond 550 plus horsepower or running forced induction, where even brief interruptions in flow can harm injector calibration and cause poor throttle response. The baffled layout also minimizes turbulence at the pump inlet, extending module life and ensuring consistent pressure. In practice, drivers experience smooth power delivery and fewer complaints about fuel delivery under dynamic driving conditions.
High Flow 400 LPH Walbro Pump for Powerful LS and LT Builds
At the heart of the kit, a 400 LPH Walbro in-tank pump is specifically chosen to support supercharged or over 550 horsepower setups without hesitation. Rated for high flow at sustained engine speeds, this pump maintains stable pressure in demanding applications, whether on the street or the track. Its compact module fits entirely within the tank, shielding the unit from road debris and reducing noise compared to external pump solutions. The internal sending unit also provides accurate fuel level readings, making it easier to monitor capacity during spirited drives. Overall, this pump module transforms the stock fuel system into one capable of matching the output of modern LS and LT engines.
All Inclusive Kit for Seamless Underbody Installation
This complete package delivers every component needed for a reliable fuel system upgrade, eliminating delays from aftermarket sourcing. Included are the 400 LPH fuel pump, in-tank module, sending unit, filler neck, vent filter, precision-matched gaskets, hardware and straps-all tailored to Cutlass A-Body specifications. Clear, step-by-step instructions walk installers through torque settings, leak-proofing techniques and proper vent routing for a secure seal that resists vibration and pressure cycles. By providing factory-grade components and mounting hardware in one box, the kit minimizes fitment issues and accelerates project completion. Whether the goal is weekend cruising or regular track duty, builders gain confidence in a system designed for durability and consistent operation.
This kit ensures consistent fuel pressure under spirited driving and for a smaller capacity fuel pump Kit at 255 LPH see our 1970-1972 Cutlass EFI Fuel Tank Kit - 255 LPH Pump.