Fleetguard FF5776 Fuel Filter 6-Pack OEM Cummins ISX ISX15 QSX 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

Specification	Value
Part Number	FF5776
Brand	Fleetguard (Cummins Filtration)
Filter Type	Secondary Spin-On Fuel Filter
Media Type	StrataPore
Micron Rating	5 Microns (SAE J 1985)
Filtration Efficiency	98.7%
Overall Height	226.52 mm (8.918 in)
Largest Outside Diameter	119.89 mm (4.72 in)
Thread Size	M90 x 2-7H INT
Gasket Material	Rubber
Housing Material	Heavy-Wall Steel
Placement	Secondary / Engine-Mounted

Compatible Cummins Engines

Engine	Configuration	Application
ISX15	CM2250, CM2250 SN, CM2350 X101	Class 8 On-Highway Trucks
ISX12 / ISX11.9	CM2250, CM2350 X102	Class 8 On-Highway Trucks
QSX11.9	CM2250 ECF	Industrial / Off-Highway
QSX15	CM2250, CM2250 X115, CM570	Industrial / Marine / Power Gen
X15	CM2350 X125M	2017+ Class 8 Trucks
ISX (2010+)	15L and 16L variants	All ISX-powered trucks (2010+)

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

Truck Brand	Models	Years
Freightliner	Cascadia, Coronado, CC122, CC132	2010-2019
Kenworth	T680, T800, T880, W900, C500, C550, T2000	2010-2019
Peterbilt	367, 384, 386, 387, 388, 389, 579, 587	2010-2019
International / Navistar	ProStar, LoneStar, PayStar 5900i, 9900i, HX620	2012-2017
Western Star	4700, 4800, 4900, 6900	2010-2019
Volvo	VNL Series (with Cummins ISX)	2010-2019

Cross-Reference Part Numbers

Cross-Reference	Brand
2893612	Cummins
2864993	Cummins
3685306	Cummins
4331007	Cummins
5365988	Cummins
5599456	Cummins
BF9885	Baldwin
P555776	Donaldson
DBF6776	Donaldson
LFF6776	Luber-Finer
WK12003	Mann
WF10123	Wix
FF1219	Hastings
H723WK	Hengst
SN40635	HIFI
P11328	Parker Racor
600123	Fleetguard Internal

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).

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