Fleetguard FF5971NN NanoNet Fuel Filter 6-Pack Cummins X15 X12 5575143

Fleetguard FF5971NN 6-Pack Cummins X15 X12 5575143

Fleetguard FF5971NN NanoNet Fuel Filter 6-Pack — Genuine OEM 4-Micron Extended-Life Filter for 2020+ Cummins X15 & X12 Engines

The Fleetguard FF5971NN 6-Pack is a case of six genuine Cummins Filtration NanoNet spin-on fuel filters designed for 2020 and newer Cummins X15 and X12 engines with EPA 2017 and EPA 2021 emission ratings. This is the MOST ADVANCED fuel filter in the Fleetguard lineup — featuring proprietary NanoNet synthetic media that delivers 4-micron filtration at 99.2% primary particle efficiency, providing the finest fuel filtration available for Cummins heavy-duty diesel engines.

The FF5971NN's headline feature is its 75,000-mile service interval — three times longer than the standard FF5776 (25,000 miles). This extended service life means fewer filter changes, less maintenance downtime, and lower total cost of ownership for fleet operators. The NanoNet media holds significantly more contaminant at consistent differential pressure compared to the older StrataPore (FF5776) and first-generation NanoNet (FF5825NN), delivering sustained protection throughout the entire extended interval.

The FF5971NN is the direct replacement for Cummins OEM 5575143 and is backwards-compatible with FF5825NN — meaning it fits the same M90 x 2-7H mount. However, it is 2.6 inches TALLER than the FF5776 (11.5" vs 8.9"). Verify clearance before upgrading from FF5776. Trusted by fleet managers, owner-operators, and diesel shops running 2020+ Freightliner, Kenworth, Peterbilt, International, and Volvo trucks with Cummins X-Series engines.

Technical Specifications

Specification	Value
Part Number	FF5971NN
Brand	Fleetguard (Cummins Filtration)
Filter Type	Spin-On Secondary Fuel Filter
Media Type	NanoNet Synthetic
Micron Rating	4 Micron (c) @ 99.2% Primary Particle Efficiency
Overall Height	292.1 mm (11.5 in)
Largest Outside Diameter	120.3 mm (4.736 in)
Gasket Inside Diameter	101.6 mm (4.0 in)
Gasket Outside Diameter	120.3 mm (4.736 in)
Thread Size	M90 x 2-7H
Thread Form	Metric
Rated Flow	4 L/min
Hydrostatic Burst Minimum	874.77 psi
Filter Position	Secondary (high-pressure side)
Service Interval	75,000 miles (duty cycle dependent)
Backwards Compatible With	FF5825NN (same M90 mount)
Upgrades/Replaces	FF5825NN, FF5776
Quantity	6 Filters Per Box

Compatible Engines

Engine	Emission Rating	Years
Cummins X15	EPA 2017, EPA 2021	2020+
Cummins X12	EPA 2017, EPA 2021	2020+
Cummins ISX15 (late production)	EPA 2017	2020+ only
Cummins ISX12 (late production)	EPA 2017	2020+ only

Important: The FF5971NN is for 2020 and newer Cummins X15/X12 engines. Pre-2020 ISX15/ISX12 engines use the FF5825NN or FF5776. Always verify your engine serial number and emission certification (EPA17 or EPA21) before ordering.

Compatible Trucks

Truck Brand	Models
Freightliner	Cascadia (2020+), Coronado, 122SD, 114SD
Kenworth	T680 (2020+), T880, W990
Peterbilt	579 (2020+), 567, 389
International	LT Series, HX Series (with Cummins X15)
Western Star	4700, 4900, 5700XE, 49X (2020+)
Volvo	VNL (with Cummins X15, 2020+)

Cross-Reference Part Numbers

Cross-Reference	Brand	Verified Source
5575143	Cummins OEM	AllProDiesel.net, Amazon, PartAndFilters.com
BF46248	Baldwin	AtYourPlaceRepair.com

NOTE: The FF5971NN is a NEWER product with LIMITED aftermarket cross-references. Most aftermarket brands have not yet released equivalents. The Cummins 5575143 and Baldwin BF46248 are the only verified cross-references as of June 2026. Your competitor incorrectly lists P550933 (Donaldson for FF5776), 33674 (Wix for FS19764), 3674 (NAPA for FS19764), and BF46002 (Baldwin — unverified) as cross-references. These are WRONG.

FF5971NN vs FF5825NN vs FF5776 — Upgrade Path

Feature	FF5776 (Original)	FF5825NN (1st NanoNet)	FF5971NN (This Product)
Media	StrataPore (cellulose)	NanoNet (synthetic)	NanoNet (advanced synthetic)
Micron Rating	5 micron	~4 micron	4 micron @ 99.2%
Service Interval	25,000 miles	25,000-50,000 miles	75,000 miles
Height	226.5 mm (8.9 in)	226.5 mm (8.9 in)	292.1 mm (11.5 in)
Thread	M90 x 2-7H	M90 x 2-7H	M90 x 2-7H
Engine	All ISX (2010+)	All ISX/X15	2020+ X15/X12 ONLY
Backwards Compatible	—	Replaces FF5776	Replaces FF5825NN

All three share the same M90 x 2-7H mount and are physically interchangeable, but the FF5971NN is 2.6 inches taller than the FF5776 and FF5825NN. Verify engine compartment clearance before upgrading.

When to Replace

The FF5971NN is designed for 75,000-mile service intervals under normal operating conditions. Actual interval depends on duty cycle, fuel quality, and operating environment. Replace sooner if you observe loss of power under load, extended cranking, fuel-restriction fault codes, or reduced fuel economy. For severe-duty applications (construction, mining, extreme temperatures), consult your Cummins dealer for adjusted intervals.

What's Included

6x Fleetguard FF5971NN NanoNet Fuel Filters — individually boxed or securely bulk packed in OEM Fleetguard packaging. Each filter is genuine Cummins Filtration with NanoNet media, not aftermarket or repackaged.

Why Choose the FF5971NN Over the FF5776 or FF5825NN?

The FF5971NN represents Fleetguard's latest advancement in fuel filtration technology. With a 75,000-mile service interval (3x longer than FF5776), a single FF5971NN eliminates TWO additional filter changes, saving labor time, parts cost, and vehicle downtime. The advanced NanoNet media captures 99.2% of particles at 4 microns — finer than the FF5776's 5-micron rating — providing superior injector protection for modern high-pressure fuel systems operating at 36,000+ PSI. For 2020+ Cummins X15 and X12 engines, the FF5971NN is the factory-specified filter that maximizes both protection and service efficiency.

Shipping Policy

Please carefully review our Shipping Policy when purchasing our products, as it applies to any order you place with us.

WHAT ARE MY SHIPPING & DELIVERY OPTIONS?

Logistics: UPS, USPS, DHL.

We offer free shipping across the USA.

All delivery times and dates provided are estimates and given in good faith.

For EU and UK consumers: This does not affect your statutory rights. Unless specifically noted, estimated delivery times reflect the earliest available delivery, and items will be delivered within 30 days after we accept your order. For more information, please refer to our Terms.

ORDER PROCESSING TIME

Processing Time: 1-2 Days
Shipping Time: 3-7 Days

DO YOU DELIVER INTERNATIONALLY?

Yes, we ship worldwide.

Note:
International deliveries may be subject to various rules and restrictions, and you may incur additional taxes and duties beyond our control. You are responsible for complying with the laws of your country and for any associated costs.

WHAT HAPPENS IF MY ORDER IS DELAYED?

If your delivery is delayed, we will inform you as soon as possible and provide a revised estimated delivery date.

For EU and UK consumers: This does not affect your statutory rights. For more information, please refer to our Terms.

QUESTIONS ABOUT RETURNS?

If you have questions about returns, please review our Return Policy.

COVID-19 STATEMENT & SHIPPING DELAYS

Please be aware that there may be shipping delays due to ongoing COVID-19 impacts. Limited transportation availability may extend delivery times. Our team is doing our best to provide accurate timelines, but the global supply chain is unpredictable, and delays may occur. We appreciate your patience and understanding during this time and are happy to assist with any questions or concerns regarding your orders.

HOW CAN YOU CONTACT US ABOUT THIS POLICY?

If you have any further questions or comments, please contact us at our Support Center.

Thank you for choosing PEAK PERFORMANCE Filters. We hope you are satisfied with your order. However, if you are not completely happy due to any damaged or missing parts, you may return the item for a refund or replacement. Please see below for more information on our return policy.

RETURNS

To be eligible for a refund, you must return the product within 14 calendar days of your purchase. The item must be in the same condition you received it and undamaged. All orders are final; we do not accept returns or exchanges unless the items received are damaged or missing.

We are not liable for any consequences arising from customers purchasing products from us and subsequently selling them on third-party platforms (Amazon, eBay, Walmart, etc.). Any actions taken by these platforms, including listing deactivation or account suspension, are beyond our control. Customers engaging in such activities do so at their own risk and should adhere to the policies and guidelines of those platforms.

RETURN PROCESS

To return an item, please contact customer service to request a refund or replacement with proof of damage or missing parts (such as videos or pictures). Once your claim is verified, contact support to obtain a return address. Securely package the item in its original packaging and include your proof of purchase (Order Invoice). When a return is authorized, PEAK PERFORMANCE Filters will proceed with the refund or replacement.

In some cases, your return shipment may be free of charge. If you return an item for a reason not related to our error, the parcel will be sent back to your original address, and no refund will be initiated.

REFUNDS

After we receive your return and inspect the item, we will process your refund or exchange. Please allow at least 14 days from the receipt of your item for processing. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your card issuer. We will notify you via email when your return has been processed.

EXCEPTIONS

The following items cannot be returned or exchanged:

Perishable items
Intimates
Gift cards
Custom items
Digital products

For defective or damaged products, please contact us using the details below to arrange a refund or exchange.

QUESTIONS

If you have any questions regarding our return policy, please contact us at our Support Center.

peakperformancefilters@gmail.com

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Fleetguard FF5971NN NanoNet...

Fleetguard FF5971NN NanoNet Fuel Filter 6-Pack — Genuine OEM 4-Micron Extended-Life Filter for 2020+ Cummins X15 & X12 Engines

WHAT ARE MY SHIPPING & DELIVERY OPTIONS?

ORDER PROCESSING TIME

DO YOU DELIVER INTERNATIONALLY?

WHAT HAPPENS IF MY ORDER IS DELAYED?

QUESTIONS ABOUT RETURNS?

COVID-19 STATEMENT & SHIPPING DELAYS

HOW CAN YOU CONTACT US ABOUT THIS POLICY?

RETURNS

RETURN PROCESS

REFUNDS

EXCEPTIONS

QUESTIONS

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Fleetguard FF5971NN NanoNet Fuel Filter 6-Pack — Genuine OEM 4-Micron Extended-Life Filter for 2020+ Cummins X15 & X12 Engines

WHAT ARE MY SHIPPING & DELIVERY OPTIONS?

ORDER PROCESSING TIME

DO YOU DELIVER INTERNATIONALLY?

WHAT HAPPENS IF MY ORDER IS DELAYED?

QUESTIONS ABOUT RETURNS?

COVID-19 STATEMENT & SHIPPING DELAYS

HOW CAN YOU CONTACT US ABOUT THIS POLICY?

RETURNS

RETURN PROCESS

REFUNDS

EXCEPTIONS

QUESTIONS

// Productos vistos recientemente

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