GM In-Tank Fuel Pump 255LPH

The Holley GM In-Tank Fuel Pump 255LPH (part number 12-914) is a high-flow electric fuel pump designed for forced-induction applications in second-generation GM vehicles. This pump delivers 255 liters per hour, making it well-suited for turbocharged and supercharged engines that demand consistent fuel pressure and volume beyond stock capabilities. The in-tank design integrates directly into the fuel tank, simplifying installation while maintaining OEM-style packaging for 1984–1992 GM Fiero, F-Body, and G-Body platforms.

At 255 LPH output, this pump addresses the fuel delivery requirements of modified engines where stock pumps fall short. Forced-induction builds generate significant boost pressure, and inadequate fuel supply leads to lean conditions, hesitation, and potential engine damage. The 255 LPH rating ensures adequate flow for sustained power delivery across the RPM range. As an in-tank pump, it operates submerged in fuel, which provides natural cooling and extends service life compared to external pump designs exposed to ambient heat. This pump is engineered to work within GM fuel system architecture, maintaining compatibility with existing fuel lines and filter configurations on these platforms.

This pump is the choice for builders working on turbocharged or supercharged Fieros, third-gen F-Bodies (Camaro, Firebird), and G-Body vehicles (Cutlass, Regal, Monte Carlo) where OEM fuel delivery cannot support modified engine output. Whether upgrading to forced induction or building a complete fuel system for increased horsepower, the 255 LPH capacity provides the volume needed without costly custom fuel system fabrication. Holley's experience in fuel system engineering makes this pump a reliable solution for street and track applications where sustained power delivery is non-negotiable.