Service Guide
Which filter kit do I need? A plain-English guide to servicing your 6.7L Cummins — what each filter does, how often to change it, and which kit covers it.
The four filters on a 6.7L Cummins
| Filter | What it does | Typical interval |
|---|---|---|
| Oil filter | Traps metal & combustion byproducts in engine oil | Every oil change |
| Fuel — Stage 1 | Primary filter + water separator, protects the pump | ~15,000 mi |
| Fuel — Stage 2 | Secondary fine filter, protects injectors | ~15,000 mi |
| Engine air | Keeps dust out of the intake | ~20,000–30,000 mi |
| Cabin air | Filters air into the cab | ~15,000–20,000 mi |
Oil & Fuel vs Complete — what's the difference?
Both kits are built for your exact truck. The Oil & Fuel Kit handles the core drivetrain service (oil + both fuel stages). The Complete Kit adds engine air and cabin air so you finish everything in one go.
How to pick in 30 seconds
- Know your year, model, and engine (all 6.7L Cummins here — 2500 through 5500).
- Decide the scope: oil + fuel only, or the complete job with air filters too.
- Pick the matching kit and choose your generation.
- Add to cart — fitment is confirmed before you pay.
Always defer to your owner's manual for exact intervals and procedures.