EFI Fuel Pump Module 78-81 Corvette 255 LPH

The Holley EFI Fuel Pump Module 78-81 Corvette 255 LPH is a purpose-built in-tank electric fuel pump assembly designed for classic Corvette models equipped with or transitioning to electronic fuel injection. This module addresses the fuel delivery demands of late-1970s and early-1980s Corvette restorers and performance builders who require reliable, OE-style mounting with modern pump capability. Whether upgrading a carbureted original to EFI or replacing a failing original fuel pump, this 255 liter-per-hour capacity module delivers consistent pressure and volume for both stock and modified engine applications.

The 255 lph output makes this fuel pump module suitable for naturally aspirated engine builds and modest forced-induction applications, providing enough reserve capacity to ensure stable idle and wide-open-throttle fueling without starvation. The in-tank design utilizes direct mounting to the fuel tank's existing sender flange, minimizing installation complexity while maintaining factory-like integration. At 3.61 lbs and compact overall dimensions of 12.3 x 9.1 x 14.3 inches, the assembly fits within tight Corvette tank constraints while keeping weight distributed low and centered—critical for maintaining the classic car's balance and handling characteristics.

Corvette enthusiasts converting C3 models (1978–1981) to fuel injection, whether using Holley's own EFI system or a competing engine management platform, will find this module's flow rate adequate for carb-to-injection swaps without excessive fuel return or heat management issues. Restoration shops and DIY builders appreciate the self-contained design that simplifies wiring and plumbing compared to external lift pumps. Proper fuel pressure regulator tuning and a quality fuel filter upstream ensure long service life and reliable cold-start and cruise performance in these iconic sports cars.