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Genuine Fleetguard FS1000 Fuel Water Separator (Pack of 6) | OEM Spin-On Filter for Cummins 3329289
Description
Stop water contamination before it reaches your high-pressure injectors. The Genuine Fleetguard FS1000 (Pack of 6) is the industry-standard spin-on protection for Cummins engines. Built with patented Stratapore™ media, it removes 95% of free water and 90% of emulsified water. Avoid risking your fuel pump on non-OEM alternatives — run the original equipment that Cummins trusts to keep heavy-duty engines on the road.
Technical Significance
Fuel purity is non-negotiable in heavy-duty diesel. The FS1000 is a mission-critical component for Cummins C, L, and M series engines. Unlike standard cellulose filters, Fleetguard's Stratapore™ media layers synthetic materials for higher particle-holding capacity and superior durability against fuel surging. This 6-pack keeps your fleet on a consistent service interval and prevents the pitting and corrosion that lead to expensive injector replacements.
OEM vs. Aftermarket Comparison
| Feature | Genuine Fleetguard FS1000 (This Product) | Generic Aftermarket Filters |
|---|---|---|
| Media Technology | Stratapore™ multi-layer synthetic | Single-layer paper (cellulose) |
| Water Separation | 95%+ efficiency | Often under 75% efficiency |
| Build Quality | Heavy-duty steel canister | Thinner shells prone to bursting |
| Micron Rating | 10-micron absolute | Variable (allows fine silt bypass) |
Package Contents
- (6) Genuine Fleetguard FS1000 spin-on filters
- (6) Pre-installed gaskets
- Factory bulk packaging — guaranteed brand new and sealed
Vehicle Compatibility
A universal spin-on fuel water separator used across a wide range of Cummins and industrial diesel applications:
- Cummins engines: 6C, 6CT, 6CTA, L10, M11, ISM, N14 series
- Thread size: 1-14 UNS-2B
Interchange / Cross-Reference: Cummins 3329289, 3315844, Wix 33406, Baldwin BF1259, Donaldson P551000.
Always verify your filter head thread size. Unsure? Message us your ESN for a 100% fitment guarantee.
Service Indicators
- "Water in Fuel" dashboard light flickering or active
- Engine stuttering, power loss, or RPM surging under heavy load
- Visible moisture or sediment in the fuel bowl
- Fleet maintenance: you run multiple units and want a reliable filter on hand
Not sure it fits? Send us your VIN or Engine Serial Number (ESN) and we'll confirm 100% compatibility before you buy. Brand new, factory-sealed, and shipped fast.
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Customer Reviews
4.7 / 5
★★★★★
Based on 3 reviews
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★★★★★ Best value buy for fleet managers
I run six L10 Cummins trucks out of our yard in Tennessee and buying these by the 6-pack makes the service intervals so much easier to manage. I just rotate through the pack every 15k miles per truck. All genuine, all sealed, and I've never had a bad one out of the box. Beats paying dealer prices every time.
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★★★★★ Stocked up and haven't looked back
These are the real deal — not knock-offs. Bought a 6-pack for my M11 Cummins motorhome and a couple of my buddy's trucks. Stratapore media does a noticeably better job than the cheap generic I used before. My diesel is crystal clear coming out the injection side now. Highly recommend stocking up.
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★★★★★ Good product, fair price
Needed these for routine maintenance on a few older Cummins engines. Filters are exactly as described — genuine Fleetguard with pre-installed gaskets. Nothing fancy, just solid quality. Four stars only because shipping took a day longer than estimated, but the product itself is great.
Frequently asked questions
How do I know this part fits my vehicle?
Every listing includes a full compatibility list by make, model, year, and engine. If you're unsure, send us your VIN or Engine Serial Number (ESN) via the chat or contact page and we'll confirm fitment before you order.
Are these genuine OEM parts or aftermarket alternatives?
Every product we sell is 100% genuine OEM — factory-sealed and sourced directly from the manufacturer or authorized distributors. We do not sell aftermarket substitutes or white-box alternatives.
Do I need a professional to install these parts?
Most fuel filters and basic maintenance components are straightforward DIY installs with basic hand tools. We recommend consulting your vehicle's service manual for torque specs and bleed procedures. For ignition components and TPMS sensors, a relearn procedure may be required — see the product description for details.