EFI Fuel Pump Module Assy. 12-Bolt 255 LPH

The Holley EFI Fuel Pump Module Assembly 12-Bolt 255 LPH is a purpose-built electric in-tank fuel delivery system designed for high-performance and custom fuel-injected engine builds. This complete fuel pump module combines proven Holley engineering with the 255 liters-per-hour output specification necessary to support aggressive naturally aspirated and forced-induction engine configurations. The assembly arrives with all installation hardware included, simplifying the transition from carbureted or mechanical fuel systems to modern EFI management.

The module features a 12-bolt flange mounting pattern and accommodates fuel tank depths ranging from 7.5 to 12 inches, making it compatible with both original equipment and retrofit fuel tank applications. The 255 LPH capacity delivers consistent flow rates across the RPM band required by modern EFI systems, while the 8 AN inlet and 10 AN outlet ports accommodate hardline or hose-based fuel distribution architectures. At 5.15 pounds and measuring 8.6 x 8.4 x 16.2 inches, the module packages compactly while maintaining the flow and pressure characteristics demanded by precision fuel injection tuning.

This assembly is engineered for builders working with late-model LS, big-block Chevy, small-block Ford, and other contemporary engine platforms being converted to EFI. The modular design allows straightforward integration into factory or custom fuel tank configurations without extensive fabrication. Builders and performance shops rely on Holley's EFI fuel pump modules to provide the stable, regulated flow required for closed-loop fuel injection systems to operate within their designed fuel pressure and delivery windows, critical for engine stability, emissions compliance, and longevity.