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Call or Text (352) 722-5295Fuel filtration on the 2019-2024 Ram 6.7L Cummins
The factory system uses two filters. Fuel leaves the electric in-tank lift pump and passes through a frame-mounted water separator, part 68436631AA, which was new for 2019. It then goes through the engine-mounted filter, 68157291AA (Fleetguard FS53000), a NanoNet element rated at 3 microns at 95 percent, before it reaches the high-pressure pump. Both filters share a 15,000-mile or 12-month interval, and Mopar sells them together as a kit for 2019-2024 trucks. Between changes, drain the water separator routinely. On the 6.7L Cummins, these two filters protect a pump that feeds the rail at up to 29,000 psi.
Why filtration matters here
Both pumps used in this generation, the CP4.2 on 2019-2020 trucks and the CP3 on 2021-2024 trucks, depend on that frame-mounted separator to keep water out. When a CP4.2 fails it sheds metal into the rail, injectors, lines and tank, and metal in the fuel filter is one of the warning signs, along with ticking, power loss, stalling or a no-start. That makes every filter change an inspection: check the old element for metal before you throw it away. After any filter service, turn the key to run and let the in-tank pump prime the system before cranking. On CP4.2 trucks there is no gear pump on the high-pressure pump, so the electric in-tank pump does all the supply work.
Stock replacement vs. upgrade
A stock truck needs two good filters on schedule, and that is the baseline for this engine. Owners who want more margin add a frame-mounted lift pump with its own filtration. AirDog and FASS build systems specifically for the 2019-2024 Ram 6.7L to steady supply pressure and remove water and air ahead of the high-pressure pump. The AirDog Raptor 4G 100 gph is internally regulated and needs no return line. The AirDog II-5G is rated 165-220 gph and is sold with fuel sump kits that replace the factory in-tank pickup draw.
What we carry
FASS: Titanium Signature Series systems in standard and PLUS versions, each also offered as No-Drop, the Drop-In Series, Extreme Water Separator filters in standard and extended-length XL, the PF3001XL particulate filter, and filter packs. AirDog: FP-100-4G and FP-150-4G air/fuel separation systems, II-5G systems, Raptor 4G 100 gph and 150 gph pumps, universal Raptor pumps, 2-micron and 10-micron replacement filters, the WS100 replacement water separator and a low-pressure indicator light. You will also find the BD Diesel Venom lift pump with filter and water separator, the G&R Diesel CAT fuel filter conversion kit, and the Fleece Performance Engineering under-bed fuel filter assembly. For complete pump systems across more trucks, see lift pumps.
Fitment notes
The water separator is the most common wrong order on this truck: 68197867AB is the 2013-2018 part, and 2019-2024 trucks take 68436631AA. The engine-mounted 68157291AA is the same for 2013-2024. Read the year range in each product title. FASS lists separate Titanium Signature kits for 2019-2020 trucks and for 2021-2024 trucks, AirDog's truck-specific kits are listed for 2019-2023, the BD Venom is listed for 2013-2022, and the G&R CAT conversion is listed for 2019-2020. On a 2019-2020 truck, confirm whether it still has the CP4.2 or the recall CP3, because fuel-system kits must match the pump on the truck. Sump kits are tank-specific, short bed versus long bed. Verify by VIN.
Frequently asked questions
What fuel filters does a 2019-2024 Ram 6.7L Cummins use?
Two per service: the engine-mounted 68157291AA, a 3-micron NanoNet element, and the frame-mounted 68436631AA water separator. Both are on a 15,000-mile or 12-month interval. Mopar sells them as a kit for 2019-2024 trucks.
Is the engine fuel filter the same as on my older 6.7L?
Yes. The engine-mounted 68157291AA (Fleetguard FS53000) is unchanged from 2013. The frame-mounted water separator is the part that changed for 2019, so a 2013-2018 separator will not fit a 2019-2024 truck.
What should I do right after changing the fuel filters?
Turn the key to run and let the electric in-tank lift pump prime the system before you crank; that protects the high-pressure pump. Drain the water separator and check the old elements for metal, which can point to a pump problem on a CP4.2 truck.
What does a frame-mounted lift pump system add?
Systems from AirDog and FASS built for the 2019-2024 Ram 6.7L steady the supply pressure to the high-pressure pump and separate water and air from the fuel before it gets there. Some, like the AirDog Raptor 4G 100 gph, are internally regulated and need no return line.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.