1968-1970 Pontiac GTO/Lemans LS and LT EFI Fuel Tank Kit 400 LPH Pump
Dropping an LS or LT engine into a classic 1968-1970 Pontiac GTO or Lemans often hits a roadblock when the stock fuel system cannot keep pace, and the 1968-1970 GTO / Lemans EFI Fuel Tank Kit meets that challenge with a 400 LPH pump engineered for sustained flow up to 550 hp. The complete assembly installs directly into the original tank without cutting or welding, so all factory mounting points, seal surfaces and routing channels remain intact using basic hand tools. Its integrated sending unit ensures linear fuel level readings under high load and compatibility with ethanol blends, while internal pump placement uses surrounding fuel as a heat sink to prevent vapor lock during full throttle demands.
Internal Pump Cooling for Vapor Lock Resistance
The 400 LPH fuel pump is fully submerged inside the tank where it uses surrounding liquid fuel as a heat sink to prevent overheating of the pump element. This in tank placement eliminates the risk of vapor lock during sustained high throttle runs by keeping the pump cool even under extreme demand. By reducing aeration in the feed line it delivers a smooth uninterrupted flow to the injector rails. Locating the pump inside the tank also simplifies plumbing and cuts operational noise compared to pumps mounted outside the tank.
Direct Fit Integration into A Body Tanks without Fabrication
The complete assembly is dimensioned to fit precisely into classic A Body fuel tanks for GTO and Lemans models with no cutting or welding needed. Every factory mounting point and seal surface is reused so original channels for fuel and vent routing remain intact. Included gaskets, straps, filler neck and vent filter ensure a leak free connection while guiding installation steps with basic hand tools. This plug and play design lets enthusiasts upgrade to modern EFI technology in a single afternoon.
Integrated Sending Unit for Precise Level Monitoring
The built in sending unit converts actual fuel volume into a linear resistance signal that keeps gauge readings smooth and accurate under all driving conditions. Its corrosion resistant construction stands up to ethanol blended fuels and constant vibration from powerful LS and LT engines. Drivers enjoy consistent information about remaining range with no erratic jumps or false empty warnings during spirited runs. This reliable feedback lets owners plan refueling stops with confidence and avoid surprises on long highway stretches.
Robust 400 LPH Capability for High Output Conversions
The high capacity 400 LPH Walbro pump supports supercharged setups or naturally aspirated engines above 550 hp with ease. Its steady flow profile provides ample volume to fuel rails for aggressive tuning and sustained high rpm operation. Internal testing under load confirms stable pressure output even at peak demand so the engine never runs lean. When paired with precise level sensing and seamless tank integration this pump forms the foundation of any LS or LT swap in classic Pontiac A Body cars.
Trust MuscleRods for a dependable fuel supply and to explore our Smaller capacity fuel pump Kit at 255 LPH see 1968-1970 GTO / Lemans EFI Fuel Tank Kit - 255 LPH Pump.