Fleetguard FF5776 Fuel Filter 6-Pack | OEM for Cummins ISX ISX15 QSX | Replaces 2893612

Fleetguard FF5776 Fuel Filter 6-Pack — Genuine OEM for Cummins ISX, ISX15, ISX12 & QSX Diesel Engines

The Fleetguard FF5776 6-Pack is a box of six genuine Cummins Filtration secondary spin-on fuel filters engineered for Cummins ISX, ISX15, ISX12, and QSX heavy-duty diesel engines. Buying a 6-Pack means you have a full year of filter changes covered (at a 25,000-mile replacement interval, 6 filters covers approximately 150,000 miles of operation). Each OEM-quality filter uses StrataPore media technology rated at 5 microns to capture 98.7% of harmful contaminants before they reach your high-pressure common-rail fuel injection system, protecting injectors from abrasive wear and ensuring clean, dry fuel delivery for optimal engine performance.

Designed with a heavy-wall steel housing and M90 x 2.0 mounting thread, the FF5776 provides superior durability under extreme operating conditions. This 6-Pack is the smart choice for fleet managers, owner-operators, and diesel mechanics who want to stock up and save — buying a case of 6 means fewer orders, lower per-filter cost, and uninterrupted maintenance schedules. Trusted across North America for Freightliner, Kenworth, Peterbilt, International, Western Star, and Volvo trucks powered by Cummins ISX engines.

Technical Specifications

Compatible Cummins Engines

Note: For 2020+ X15/X12 engines requiring extended service intervals, Fleetguard recommends the upgraded FF5825NN (NanoNet media). The FF5776 and FF5825NN share the same M90 x 2.0 mount and are physically interchangeable.

Compatible Trucks & Equipment

Cross-Reference Part Numbers

When to Replace

Replace the FF5776 every 25,000-40,000 miles or at each oil change interval, whichever comes first. Signs your fuel filter needs replacement include loss of power under load, extended cranking on start-up, fuel-restriction or low-suction-pressure fault codes, and reduced fuel economy.

What's Included

6x Fleetguard FF5776 Fuel Filters with O-Rings — packed in one factory-sealed Fleetguard box. Each filter is individually sealed for freshness. You receive a full case of 6 genuine Fleetguard filters, not aftermarket or repackaged units.

Why Choose Genuine Fleetguard?

Fleetguard is the filtration division of Cummins Inc., the manufacturer of the ISX, ISX15, and QSX engines. When you install a Fleetguard FF5776, you are using the exact same filter that Cummins designs, tests, and approves for their engines. Aftermarket alternatives may fit the same mount but often use inferior media that allows more contaminants to reach your injectors, leading to premature fuel system wear and costly repairs ($5,000-$15,000+ for injector replacement on ISX engines).