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Description
FF5971NN FUEL FILTER SPIN-ONCross References Brand Manufacturer Part Number Baldwin BF46248 Carquest 96891 Cummins (OEM) 4940647, 5575143, 557 5143 Donaldson DBF5811 Fleetguard (Main Product) FF5971NN Luber finer LFF5686, LFF5804 NAPA 601071 Wix WF10891 Technical Specifications Feature Details Value Product Type Premium Secondary Spin On Fuel Filter Filtration Media NanoNet Advanced Synthetic Media Micron Rating 4 Micron (at 99. 2% Primary Particle Efficiency) Overall Height 11.
Cross References
| Brand / Manufacturer | Part Number |
|---|---|
| Baldwin | BF46248 |
| Carquest | 96891 |
| Cummins (OEM) | 4940647, 5575143, 557 5143 |
| Donaldson | DBF5811 |
| Fleetguard (Main Product) | FF5971NN |
| Luber-finer | LFF5686, LFF5804 |
| NAPA | 601071 |
| Wix | WF10891 |
Technical Specifications
| Feature | Details / Value |
|---|---|
| Product Type | Premium Secondary Spin-On Fuel Filter |
| Filtration Media | NanoNet™ Advanced Synthetic Media |
| Micron Rating | 4 Micron (at 99.2% Primary Particle Efficiency) |
| Overall Height | 11.50 inches (292.1 mm) |
| Largest Outside Diameter (O.D.) | 4.736 inches (120.3 mm) |
| Gasket Outside Diameter (O.D.) | 4.736 inches (120.3 mm) |
| Thread Configuration | M90 X 2 - 7H (Metric Thread Form) |
| Service Capacity Life | Extended lifecycle support up to 75,000 miles / 1,000 hours (depending on operational duty class) |
| Product Department | Air & Fuel Delivery Systems / Engine Fuel Filtration |
Applications & Compatibility Guide
| Category | Usage & Compatible Truck Models |
|---|---|
| Recommended Use | • Tailored as a high-performance secondary spin-on fuel filter for Class 8 commercial fleets, line-haul tractors, and heavy vocational vehicles requiring uncompromising fuel rail safety. |
| Truck & Engine Models | • Compatible Diesel Engine Generations: - Cummins X15 Series (Efficiency, Performance, and Productivity Configurations) - Cummins L9 Series - Cummins ISL9 Series - Cummins B6.7 / ISB6.7 Series - Paccar ISX Family Platforms • Heavy-Duty Commercial Truck Brands (Configured with matching engine setups): - Freightliner, International, Kenworth, Peterbilt, Spartan, Volvo, Western Star - Manufactured in model years: 2020, 2021, 2022, 2023, 2024, 2025, 2026. |
| Purpose & Function | • Engineered utilizing proprietary NanoNet™ media which features a highly consistent structural pore design to permanently capture fine contaminants even under intense chassis road vibration. • Seals out tiny particulate matter, fuel sludges, and moisture down to a strict 4-Micron boundary line, directly protecting modern High-Pressure Common Rail (HPCR) injection loops from abrasive scratching or injector clogging. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Wow!!!
Size: King
I couldn’t be happier with this mattress cover—it completely transformed my sleep.
I had one of the best nights of sleep I’ve had in a long time—no tossing and turning, just pure comfort. It stays in place nicely and feels high-quality and well-made. Fluffy without the bulk.
If you’re looking to upgrade your sleep without buying a whole new mattress, this is absolutely worth it. Highly recommend!
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Best sleep matress topper
Size: Queen
Ordered after running out of options to get a good night's rest. Placed Q sized mattress topper on a tempur pedic matress and 1st night slept like a baby on a cloud. Ever since then I have knocked out after sleeping and moved less at night. Restful sleep has blessed out house again. It feels like a hotel comfy mattress. Totally recommend.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
It’s like a nice hug.
Size: Queen
I find this mattress pad very comfortable to sleep on. I originally bought it because my mattress was too hard. The mattress pad solved the problem. It’s nicely quilted making it very cushy. I’m very happy with it.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Fixed my aches, real improvement in sleep
Size: Queen
It actually does make my bed feel better.
I was skeptical, but decided to try it because our mattress isnt very old but I wake up with aches in my hips/lower back. When I got it, I thought no way this works. But it does.
It goes in like a fitted sheet, super easy to put on. And I honestly havent woken up with hip or lower back aches since using it. Had it on our bed for about 2 months now.
I read some people say they sleep hotter with it, but I havent noticed that at all. Temperature feels the same as without it.
So glad I tried this before spending money on a mew mattress!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Best Mattress Pad!
Size: Queen
This is the best mattress pad you are going to find anywhere and the price is actually a bargain compared to all the other mattress pads I saw in the stores or online. Thought I needed a new mattress but all I needed was this comfy cover.
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Reviewed in the United States on April 26, 2026