Don't let microscopic silt ruin your injectors. Your 6.7L Cummins Diesel uses a sophisticated two-stage filtration system, and the Genuine Mopar 68157291AA (MO-291) is your engine’s final line of defense. This engine-mounted NanoNet® filter is specifically designed to trap particles as small as 2 microns, ensuring only the purest diesel reaches your high-pressure common rail.
🧠 WHY THIS MATTERS
At Valtrix Powertrain, we know that diesel performance is won or lost in the fuel system. The MO-291 isn't just a standard pleated paper filter; it features advanced filtration media designed to handle the high flow rates of the 6.7L Cummins without dropping pressure. Using a non-OEM filter in this location often leads to "Dry Starts" or "Fuel Rail Pressure Low" codes—issues you can completely avoid by sticking with the factory-certified Mopar standard.
🆚 OEM vs AFTERMARKET
| Feature |
Genuine Mopar 68157291AA |
Generic Aftermarket Filters |
| Micron Rating |
2-Micron NanoNet® Technology |
Often 5–10 microns (allows damage) |
| Flow Rate |
Optimized for Cummins High-Pressure |
Can cause fuel starvation under load |
| Housing Seal |
Precision-molded for zero bypass |
Poor fitment allows "dirty" fuel to leak past |
| Service Life |
Full 15,000-mile interval capacity |
May clog prematurely or collapse |
📦 WHAT'S INCLUDED
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(1) Genuine Mopar Engine-Mounted Fuel Filter (Part #68157291AA / MO-291)
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(1) High-Spec Sealing O-Ring
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Factory Sealed Box (Guaranteed Original Equipment)
⚙️ COMPATIBILITY
This is the engine-mounted fuel filter for 2013–2024+ Ram Diesel trucks.
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Vehicle Fitment: Ram 2500, 3500, 4500, 5500.
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Engine Type: 6.7L I6 Cummins Turbo Diesel.
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Model Years: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.
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Interchange: 68157291AB, MO-291, 514316AC.
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💡 SEO Note: For 2013+ models, this filter works in tandem with the frame-mounted 68197867AB separator. We recommend replacing both at the same time.
🚨 SIGNS YOU NEED THIS
It’s time to swap your MO-291 filter if you experience:
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Engine surging or hesitation at highway speeds.
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Hard starting (prolonged cranking before the engine fires).
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Black smoke or decreased fuel economy.
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Service Interval: You’ve hit the 15,000-mile mark since your last fuel system service.
🛒 WHY BUY FROM VALTRIX
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Authenticity Guaranteed: We specialize in Cummins-specific components. No fakes, no "will-fits," only genuine Mopar.
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Fast Logistics: We ship from US-based warehouses to get you back on the road.
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Technical Expertise: Our team understands the nuances of the 6.7L fuel system.
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Risk-Free Returns: 14-day hassle-free return policy for peace of mind.
Give your Cummins the protection it deserves. A clean engine starts with clean fuel. Ensure your injectors stay healthy and your warranty stays valid.
👉 [ADD TO CART] and experience the Valtrix difference in powertrain reliability.
❓FAQ
Q: Is this the filter located under the hood or under the truck?
A: This (68157291AA) is the engine-mounted filter located under the hood. You likely also need the 68197867AB frame-mounted filter to complete a full service.
Q: Does it come with the O-ring?
A: Yes, every Genuine Mopar MO-291 kit includes a new sealing O-ring for the filter housing.
Q: Do I need to "prime" the system after installing this?
A: Yes. After installation, turn the ignition to 'RUN' (don't start) for 30 seconds, repeat 3–5 times. This allows the electric lift pump to fill the canister and purge air.
