Doc's Diesel 6.7L Cummins Filter Combo Kit for RAM 2500/3500 (2013–2018) — Complete oil, fuel/water & air filters, tested efficien

Doc's Diesel Filter Combo Kit gives you all the engine and fuel filters matched to 6.7L Cummins RAM 2500/3500 (2013–2018) in one convenient package.

This kit bundles the filters you need for routine service: fuel/water separators, oil filter, and engine air filter sized for Ram 6.7L Cummins diesel engines from 2013 through 2018. Each component is third‑party tested for efficiency and dust capacity so you can replace service parts with confidence. The set is intended to simplify maintenance, reduce order errors, and ensure you have the correct parts for a single service interval.

What parts come in this combo and why are they matched?

The kit includes a DGF410 fuel/water separator, a DGF401 fuel/water separator, a D5335 oil filter, and a DPA6314 engine air filter. Doc's Diesel selects each element to fit the same 6.7L Cummins applications so one purchase covers the typical diesel service.

• DGF410 & DGF401: dual fuel/water separators optimized for diesel fuel cleanliness and water removal.
• D5335 oil filter: spin-on oil filtration matched to engine oil flow and capacity.
• DPA6314 air filter: pleated media sized to maintain airflow while trapping particulates.

How effective are the filters at removing contaminants?

Independent testing confirms the kit’s components deliver high efficiency and dust-holding performance, not just manufacturer claims. This helps protect fuel injectors, the oiling system, and the turbo by reducing abrasive particles and trapped moisture.

• Overall efficiency tested at 99.25 percent with substantial dust-holding capacity (344.2 g).
• Fine-particle capture rated at 98.49 percent down to 4 microns for critical protection.
• Separators designed to separate and hold water from diesel before it reaches the engine.

When should I change each filter in the kit?

Service intervals depend on your vehicle usage and manufacturer warranty requirements; the kit provides guidance that aligns with common diesel service practices. Follow your RAM owner’s manual for official intervals and inspect filters more often under heavy-duty use or dirty environments.

• Fuel filter/water separators: typically every 5,000–10,000 miles, up to 15,000 miles maximum depending on conditions.
• Oil filter: commonly changed every 5,000–7,000 miles with oil change, up to 10,000–15,000 miles depending on oil type and service recommendations.
• Engine air filter: inspect at each oil change; replace sooner when frequently driving in dusty or off-road conditions.

Will this kit fit my RAM model and how do I confirm fitment?

The combo is built specifically for Ram 6.7L Cummins engines from 2013 through 2018, including 2500 and 3500 trucks and specified 4500/5500 variants where applicable. Use the fitment card provided on the product page to confirm year, cab configuration, and engine options before ordering.

• Designed for 6.7L Cummins diesel across 2013–2018 Ram heavy-duty models.
• Check the included fitment card or your VIN to ensure exact compatibility.
• One kit covers the common service parts for a single maintenance event—no need to match pieces separately.

Who is this for? Technicians, fleet managers, and DIY Ram owners who want a time-saving, verified set of service filters for 6.7L Cummins pickups will benefit most from this kit. If you maintain a 2013–2018 RAM 2500, 3500, or eligible 4500/5500 with the 6.7L Cummins engine and prefer parts with independent test data and matched fit, this combo removes the guesswork and keeps routine maintenance organized.