SEMA 2025: Holley’s New Fox Mustang Fuel System Debuts at SEMA

Building a clean fuel system for a 1986-1993 5.0-liter Mustang has often meant piecing together parts and hoping for the best. Holley‘s new Fox Mustang Fuel System kits, unveiled at SEMA 2025, are designed to eliminate that guesswork entirely.

This is a complete, direct-replacement solution engineered for fuel-injected Fox bodies. Each kit (P/N 526-25) is a complete package, containing the fuel pump module, filters, all necessary braided fuel lines, fittings, clamps, hardware, and even a dedicated electric pump wiring harness. The entire system is designed for a clean, OEM-style installation that avoids the need for heavy modifications or custom fabrication.

Holley is offering options for every build, from stock restorations to high-horsepower EFI monsters. The kits are compatible with both pump gas and E85 and can be optioned with either a 340- or 525-liter-per-hour fuel pump module.

The package also includes a billet filter and a fuel pressure regulator, complete with a gauge. You get forty feet of -6AN or -8AN braided hose, which is more than enough to run feed and return lines from the tank to the engine bay. All the required AN fittings and EFI-rated clamps are in the box, ensuring a polished, reliable setup.

One of the best parts is the installation design. Holley engineered the Fox Mustang Fuel System to use as much of the original chassis and sheetmetal routing as possible. This keeps the installation incredibly straightforward and clean, requiring minimal to no drilling.

The system integrates perfectly with your Mustang’s factory layout. To support the new high-flow pump, a new electric fuel pump harness and relay wiring kit is included. This is critical for ensuring the pump receives proper, stable amperage, which in turn improves reliability and keeps fuel pressure steady under all conditions.

There’s no need to create a confusing shopping list of mismatched components. Holley’s step-by-step instructions guide you through the process. The combination of serious performance, simplified installation, and an OEM-like appearance makes this the definitive Fox Mustang Fuel System upgrade for anyone restoring or modifying their car for the street or track.