Fuel Pump 400 LPH

The Fuel Pump 400 LPH from AEM Electronics is a high-performance electric fuel pump designed for enthusiasts and mechanics building modified engines that demand consistent fuel delivery at elevated pressures. Whether you're tuning a turbocharged engine, upgrading to a larger displacement, or running aggressive fuel mapping, this 400-liter-per-hour pump handles the flow requirements that stock OEM pumps simply cannot sustain. Built as an in-tank pump assembly, it replaces restrictive factory units and unlocks the fuel delivery headroom necessary for serious engine modifications and track applications.

AEM's engineering focuses on reliability under continuous high-demand operation, utilizing brushless motor technology and precision-engineered internals to maintain rated flow across the RPM band without cavitation or pressure drop. The 400 LPH specification ensures adequate fuel supply for forced-induction builds, high-rev naturally aspirated engines, and fuel injection systems tuned beyond OEM parameters. The compact form factor and standard mounting interface make integration into existing fuel tanks straightforward, while the pump's robust construction handles the thermal and mechanical stress that comes with sustained boost pressure and lean-condition tuning adjustments.

This pump is ideal for turbocharged four-cylinder platforms, naturally aspirated V8 builds, and any application where the factory pump becomes a bottleneck during dyno sessions or high-load driving. Professional tuners and builders rely on the Fuel Pump 400 LPH when jetting up fuel pressure regulators and fine-tuning fuel maps on the stand. Verify compatibility with your vehicle's fuel tank configuration and fuel system pressure requirements before installation; most modern EFI systems will benefit from a quality external fuel pressure regulator paired with this pump to maintain target rail pressure across all load conditions.