Description
Front & Rear Fuel Filter Set for 2019–2020 Ram 6.7L Cummins
Ram's 6.7L Cummins uses a two-stage fuel filtration system: a primary filter under the hood and a secondary filter on the frame rail. For 2019–2020 trucks, the rear filter changed to a 68436631AA drop-in cartridge while the front filter remained the 68157291AA canister element. This iFJF filter set gives you both filters in one package — correctly matched to your 2019–2020 truck.
Don't mix up model years. Don't buy the wrong rear filter. Don't replace just one filter and leave the other clogged. This set removes the guesswork.
Vehicle Fitment
| Year |
Make |
Model |
Engine |
| 2019–2020 |
Ram |
2500 / 3500 / 4500 / 5500 |
6.7L Cummins Turbo Diesel |
⚠️ Important: This set is for 2019–2020 trucks with the updated rear filter design (68436631AA cartridge in 68358393AA housing). If your rear filter looks like a canister (same diameter as the front filter), your truck uses the older 68157291AA-style rear filter — see our other listing for the 2013–2018 fuel filter set.
Understanding the Two-Stage System
Your Ram 6.7L Cummins has two fuel filters working in sequence:
Stage 1 — Front Filter (68157291AA): Located under the hood on the driver-side. This is the primary filter and water separator. It removes bulk water and larger contaminants from the fuel before it reaches the lift pump. The housing cap (68065612AA) is the part most owners strip or crack during service.
Stage 2 — Rear Filter (68436631AA): Located on the driver-side frame rail, just ahead of the fuel tank. This is the secondary "polishing" filter. After the lift pump pressurizes the fuel, this 5-micron filter does the fine work — catching anything that made it past the primary before fuel enters the CP4 high-pressure pump. On 2019+ trucks, Ram switched to a cartridge-style filter in a sealed housing (68358393AA) with a removable cover (68436815AA) — a cleaner design that doesn't spill fuel during changes.
Why both matter: If either filter is clogged or bypassed, the other works harder — and the CP4 pump is the first component to suffer. Always replace both filters as a set.
Key Features
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✅ Correct Pair for 2019–2020 — Includes both the 68157291AA front filter and the model-year-specific 68436631AA rear cartridge. No guessing, no returns because you ordered the wrong rear filter.
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✅ 5-Micron Dual-Layer Media — Both filters use synthetic-blend media with a water-separating outer layer. Rated to capture 98% of emulsified water and 99%+ of particles ≥5 microns.
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✅ All O-Rings Included — Fresh seals for both filter positions. Using old O-rings is the #1 cause of post-service air leaks.
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✅ IATF 16949 Certified — Manufactured in our certified facility to the same quality standard required by FCA/Stellantis.
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✅ Cross-References 20+ Part Numbers — Covers Mopar, Fleetguard, WIX, Baldwin, ACDelco, Luber-Finer, Hastings, and more.
OEM Part Number Cross-Reference
| Part Number |
Brand |
Position |
| 68157291AA |
Mopar |
Front Filter (Primary) |
| 68436631AA |
Mopar |
Rear Filter (Secondary) |
| 68065608AA |
Mopar |
Front Filter (superseded PN) |
| PF46152 |
Mopar / ACDelco |
Rear Filter |
| MO608 / MO291 |
Mopar |
Front Service Kit |
| FS53000 / FS43255 |
Fleetguard |
Front Filter |
| PF9870 / PF1070 |
ACDelco |
Front Filter |
| 33255 / WF10013 |
WIX |
Front Filter |
| FF1199 |
Baldwin |
Front Filter |
| L6806F |
Luber-Finer |
Front Filter |
| CS11037 |
Hastings |
Front Filter |
| 4947561 |
Cummins |
Front Filter |
Service Interval
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Normal duty: Both filters every 15,000 miles or 12 months
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Severe duty (towing, dusty, biodiesel B5–B20): Every 7,500 miles
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Water-in-Fuel light: Drain water separator AND replace both filters immediately
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Always replace as a pair — a new rear filter behind a clogged front filter offers zero protection
Installation Notes
Front Filter (68157291AA): Under the hood, driver-side. Use 28mm socket or fuel filter cap wrench. Remove cap, swap element and O-ring, reassemble. 10 minutes.
Rear Filter (68436631AA): Under the truck, driver-side frame rail. The 2019+ design is cleaner than the older canister — simply remove the 68436815AA cover screws, lift the cover, swap the cartridge, replace the cover. No draining required; fuel stays in the housing. 5–10 minutes.
After installation, cycle the key to RUN (without starting) 3–5 times to re-prime the fuel system before starting the engine.
Frequently Asked Questions
Q: How do I know if my 2019 Ram uses the old or new rear filter?
A: Look under the truck at the rear filter housing. If it's a cylindrical canister with a hex cap (same style as the front underhood filter), you have the older design — use the 68157291AA rear filter. If it's a rectangular housing with a flat cover held by screws, you have the 2019+ design — this is the correct kit.
Q: What's the difference between this and the kit that includes the oil filter?
A: This kit includes both fuel filters only (68157291AA + 68436631AA). If you also need the 5083285AA oil filter, see our Complete Service Kit listing which bundles all three.
Q: Can I replace just one filter?
A: Technically yes, but we strongly advise against it. Both filters work as a system. If you replace the rear filter but the front is clogged, unfiltered fuel bypasses the primary and overwhelms the secondary almost immediately. Replace both filters for complete protection.
Q: Does this kit include the housing cap?
A: No. The 68436815AA cover and housing are reused from your truck. If your front filter cap (68065612AA) is cracked or stripped, we sell billet aluminum replacement caps in multiple colors — see our related products below.
🛠️ Complete Your Ram 6.7L Fuel System Service
Need more than just this part? These products are designed to work together:
