Doc's Diesel 6.7L Cummins Filter Combo Kit — RAM 2500/3500 2019–2024, fuel/air/oil, 99.25% efficiency

Doc's Diesel Filter Combo Kit is a matched set of fuel/water separators, engine air and oil filters engineered to replace factory items on 6.7L Cummins RAM 2500/3500 (2019–2024), giving verified filtration efficiency and a single-order service solution.

This combo assembles the filters you need for routine maintenance—two fuel/water separators (DGF430 and DGF401), an engine air filter (DPA6314) and an oil filter (D5335)—so you can perform a scheduled service without sourcing parts individually. Components in this kit were third-party tested for particle efficiency and dust-holding capacity, and each component is sized and designed to fit Ram 6.7L Cummins diesel trucks from 2019 through 2024. Before ordering, use the fitment card on the product page to confirm your truck’s exact year and configuration.

How reliable is the filtration performance?

Independent lab testing shows high efficiency across the kit: overall component efficiency is rated at 99.25% with a dust holding capacity of 344.2 g, and the system filters down to 3 microns at 99.1% efficiency. These verified numbers mean the kit captures fine contaminants that can accelerate wear in fuel and engine systems.

• Third-party verified 99.25% overall efficiency.
• 99.1% efficiency at 3 microns for fine-particle capture.
• 344.2 g dust holding capacity to extend service intervals.

What parts are included and how do they work together?

The kit includes two fuel/water separators (DGF430 and DGF401), an engine air filter (DPA6314) and an oil filter (D5335) matched to the same vehicle application. Fuel/water separators remove water and large particulates from fuel, the engine air filter prevents inhalation of abrasive dust into the turbo and cylinders, and the oil filter keeps contaminants out of the lubrication system.

• DGF430 + DGF401 fuel/water separators for staged fuel cleaning.
• DPA6314 engine air filter to protect intake and turbo components.
• D5335 oil filter to trap metal and combustion byproducts.

When should I change these filters?

Service intervals depend on your vehicle's manufacturer recommendations and operating conditions. As a guideline, change fuel filters/water separators between 5,000 and 15,000 miles and oil filters between 5,000 and 15,000 miles, adjusted for tow-load, off-road use, and severe duty cycles.

• Fuel filter/water separators: typically every 5,000–10,000 miles (15,000 miles maximum by guide).
• Oil filters: change with oil service—commonly 5,000–7,000 miles for heavy duty schedules.
• Inspect more often under dusty or high-moisture conditions.

Will this kit fit my Ram 6.7L Cummins truck?

This combo was built to fit Ram 6.7L Cummins 2500, 3500, 4500 and 5500 models from 2019–2024, but fitment can vary by year and factory options. Always cross-check the exact part numbers or use the fitment card on the product page to verify compatibility with your truck’s model year and configuration before purchase.

• Designed for 6.7L Cummins on Ram 2500/3500/4500/5500 (2019–2024).
• Check fitment card for year and configuration matching.
• Contact support if you have nonstandard factory options or aftermarket plumbing.

Who is this for: This Doc's Diesel Filter Combo Kit is intended for owners and technicians who perform regular maintenance on 6.7L Cummins-powered Ram trucks and want a verified, matched set of fuel, air and oil filtration components. It suits fleet managers, independent diesel shops, and DIY truck owners who prefer to replace all service filters in one convenient package and rely on third-party efficiency verification rather than marketing claims.