Doc's Diesel Filter Combo Kit for 6.7L Cummins RAM 2500/3500 (2019–2024) — matched fuel, air & oil filters, lab-tested

This kit groups the parts commonly replaced together during routine maintenance so technicians and DIYers avoid multiple orders, mismatched components, and downtime. Each element in the combo is engineered for the specified Ram 6.7L Cummins applications and third-party efficiency testing verifies particle capture and dust-holding performance. Use the fitment card on the product page to confirm compatibility with your exact model year and drivetrain options before purchasing.

What parts are included and why do they matter?

The kit contains four components selected to cover fuel, air, and oil service needs: DGF430 and DGF401 fuel/water separators, DPA6314 engine air filter, and D5335 oil filter. Having the matched items in one package reduces part-mismatch risk and saves ordering time.

• DGF430 & DGF401: dual fuel/water separators for reliable water separation and particle filtration.
• DPA6314: engine air filter designed for high dust-holding capacity and airflow balance.
• D5335: oil filter sized for correct bypass characteristics and capacity for the 6.7L Cummins.

How effective are these filters at removing contaminants?

Independent lab testing confirms the components reach verified efficiency levels and substantial dust-holding capacity, giving an objective measure of performance rather than a claim from the manufacturer. That helps you assess filtration capability under real-world loading conditions.

• Overall tested efficiency: 99.25 percent capture rate in lab evaluations.
• Fine particle performance: 99.1 percent efficiency down to 3 microns.
• Dust capacity: 344.2 grams of dust-holding reported in third-party testing.

When should I replace each filter in the kit?

Service intervals vary by component and driving conditions; follow your vehicle manufacturer’s recommendations and warranty requirements for precise timing. Typical guidance is given as ranges to accommodate normal and severe use.

• Fuel filter/water separators: commonly every 5,000–10,000 miles, up to 15,000 miles maximum depending on fuel quality and duty cycle.
• Oil filter: typically changed every 5,000–7,000 miles for frequent oil changes, extendable to 10,000–15,000 miles if using extended-interval oil and meeting manufacturer guidance.
• Engine air filter: inspect at each oil change and replace based on visual condition or heavy dusty environments.

Will these fit my Ram truck model and how do I confirm fitment?

The kit is built for Ram trucks equipped with the 6.7L Cummins engine across specified model years and chassis classes. Because Ram configurations vary by year and option, always use the fitment card or VIN lookup on the product page to verify compatibility before purchase.

• Application coverage: Ram 2500 and 3500 with 6.7L Cummins, model years 2019–2024.
• Check: use the on-page fitment tool or provide your VIN to confirm exact fitment.
• Fitment support: contact seller support if your truck has nonstandard or aftermarket modifications.

Who is this for: This combo kit suits owners, fleet managers, and independent shops that service 6.7L Cummins-equipped Ram 2500/3500 trucks and want a single, matched parts solution for routine maintenance. It’s especially useful for those who prefer verified test data when selecting replacement filters and who value convenience when planning scheduled service intervals.