Dual In-Tank Fuel Pump Module 450LPH w/Return

The Dual In-Tank Fuel Pump Module 450LPH with Return by Holley is purpose-built for high-performance fuel system upgrades on vehicles requiring robust flow capacity and return-line capability. This module addresses the critical bottleneck in modified engine builds where stock fuel delivery falls short—whether you're running a turbocharged application, naturally aspirated big-displacement engine, or fuel-injected classic car conversion. The 450 LPH (liters per hour) rating delivers the sustained volume needed for serious power while the integrated return circuit maintains system pressure stability and fuel temperature management under sustained load.

Holley engineered this dual pump module with in-tank installation, meaning both pumps live submerged in fuel for superior cooling and noise isolation compared to frame-mounted alternatives. The return-line design prevents fuel starvation during acceleration and maintains consistent rail pressure across engine load ranges, critical for tuning stability and drivability. At 6.6 lbs and compact enough to fit within standard fuel tank dimensions (9.2 x 6 x 12.6 inches), this module integrates seamlessly into most tank configurations without major fabrication. The dual pump redundancy also provides a safety margin if one unit experiences premature wear—common in high-mileage performance vehicles pushing sustained power output.

Mechanics and enthusiasts upgrading fuel systems on LS swaps, 4-cylinder turbo builds, big-block restorations, and fuel-injected conversions will find this module eliminates guesswork around pump selection and plumbing complexity. The 450 LPH capacity supports engines in the 450–600 hp range depending on fuel type and injection strategy, making it ideal for street/strip cars and weekend track weapons. Installation requires basic tank access and compatible sending unit provisions, though professional installation is recommended to ensure proper return-line routing and electrical integration with your engine management system.