Doc's Diesel 6.7L Cummins Filter Combo Kit for Ram 2500/3500 (2013–2018) — matched fuel, oil & air filters, tested efficiency

Doc's Diesel Filter Combo Kit supplies the matched fuel, oil and engine air filters engineered for 6.7L Cummins RAM 2500/3500 (2013–2018) to complete a scheduled service in one order.

If you maintain a Ram 6.7L Cummins from model years 2013–2018, this combo brings the specific filters you need together: two fuel/water separators (DGF410 and DGF401), an oil filter (D5335) and an engine air filter (DPA6314). Components are third-party tested for particle capture and dust capacity so you can compare performance numbers rather than take a claim at face value. The kit is built to save time and reduce parts sourcing mistakes during routine maintenance.

How well do these filters capture dirt and water?

The filter elements in this kit have independent test results showing high efficiency and substantial dust holding. Those measurements let you assess how long the filter can perform before clogging and how effectively it removes fine contaminants from fuel and air.

• Verified overall efficiency: 99.25 percent
• Fine particle efficiency: 98.49 percent down to 4 microns
• Dust holding capacity: 344.2 grams
• Includes fuel separator designs that help trap free water and particulates

Which vehicles and model years does this kit fit?

This combo is matched specifically for Ram trucks with the 6.7L Cummins diesel engine across several models and years. Always use the fitment card on the product page to confirm your exact year, cab, and drivetrain before ordering to avoid fitment errors.

• Designed for: Ram 2500 and 3500 with 6.7L Cummins
• Covered model years: 2013–2018
• Also compatible with some 4500 and 5500 applications—verify via fitment card
• One kit supplies all filters needed for a standard service

What exactly is included in the Doc's Diesel Combo Kit?

The bundle contains the fuel and oil filtration pieces you typically replace during a scheduled service, matched so every part suits the same vehicle application. This reduces ordering multiple SKUs and ensures consistent filtration performance across systems.

• DGF410 fuel water separator
• DGF401 fuel water separator
• D5335 oil filter
• DPA6314 engine air filter
• Packaged to cover fuel, oil, and engine air service in one shipment

When should I replace each filter in the kit?

Recommended service intervals depend on driving conditions and your vehicle manufacturer’s guidance. Use these ranges to plan regular maintenance and check filters more frequently in dusty or severe environments.

• Fuel filter / water separators: change every 5,000–10,000 miles; maximum 15,000 miles
• Oil filters: typical replacement every 5,000–7,000 miles; max 10,000–15,000 miles depending on oil and driving
• Engine air filters: follow manufacturer interval or inspect more often in dusty conditions
• Always follow your vehicle warranty and service schedule for final guidance

Who is this for: technicians, fleet managers and owners of Ram trucks with the 6.7L Cummins who want a single, verified kit that supplies the correct fuel separators, oil filter and engine air filter for routine servicing. It’s ideal for anyone who prefers proven test data, matched parts to avoid fitment mistakes, and the convenience of one-order servicing supplies.