Doc's Diesel Fuel Water Separator for 6.7L Cummins RAM 2500-5500 (2013-2018) — Direct-fit, 2 elements, high-efficiency filtration

Doc's Diesel Fuel Water Separator is a direct-fit replacement for 2013–2018 Ram 6.7L Cummins trucks that removes water and contaminants to protect the fuel system.

If you drive a 2013–2018 RAM equipped with the 6.7L Cummins, keeping water and debris out of your fuel is critical to reliable operation. Doc's Diesel offers a tested fuel/water separator engineered to match OEM fit and filtration performance. The kit includes two elements and cross-references common OEM and aftermarket SKUs, making it easy to service on schedule.

How does this separator protect my 6.7L Cummins engine?

The separator captures free water and traps particles before they reach the high-pressure fuel system, reducing wear and the risk of injector or pump damage. It is designed to match factory fitment so it installs without modification and maintains proper fuel flow.

• Independent lab-tested efficiency—DGF410: 98.49% down to 4 microns.
• DGF401 option rated 93.48% efficiency down to 3 microns.
• Removes water, dirt, rust, and debris before fuel delivery.
• Direct-fit for RAM mounting points—no adapters needed.

Which RAM models and years does this part fit?

This Doc's Diesel kit is manufactured for the 6.7L Cummins in 2013–2018 RAM trucks, covering 2500, 3500, 4500, and 5500 chassis. Use the vehicle fitment card on the product page to confirm exact compatibility for your year and drivetrain configuration.

• Fits 2013–2018 Ram 6.7L Cummins: 2500, 3500, 4500, 5500.
• Includes reference SKUs for Mopar, Wix, Fram, Baldwin, Premium Guard, and Purolator.
• Designed to match factory mounting and sealing surfaces.

When should I replace the fuel/water separator?

Replacement intervals depend on driving conditions and manufacturer recommendations; typical service ranges from 5,000 to 15,000 miles. Inspect the separator during scheduled maintenance and replace sooner if you detect fuel contamination, performance changes, or water collection under the drain.

• Recommended change interval: every 5,000–10,000 miles; max 15,000 miles.
• Replace immediately if water or heavy sediment is present.
• Follow vehicle warranty and service schedule guidance.

What parts and cross-references are included?

The package supplies two fuel/water separator elements with cross-reference information to help you match OEM and popular aftermarket part numbers. That makes sourcing and future replacements simpler while ensuring you keep the filtration level consistent with the original equipment.

• Includes two separators and interchange SKUs: Mopar 68157291AA, Wix 33255, Fram CS11037, Baldwin PF9870, Premium Guard DF8606, Purolator F36294.
• Includes Doc's SKU DGF410 (and DGF401 option referenced for different micron performance).
• Packaged for fast field service and straightforward swap-in replacement.

Who is this for: This Doc's Diesel fuel/water separator is for RAM owners and technicians who need an OEM-fit filtration element for the 6.7L Cummins (2013–2018). It's suited to fleet managers, diesel enthusiasts, and anyone performing routine maintenance who wants a tested, cross-referenced replacement that removes water and fine contaminants to help preserve fuel system components.