Ditch the OEM Plastic: Why Upgrading Your 6.7L Cummins Breather Cover Matters
Ditch the OEM Plastic: Why Upgrading Your 6.7L Cummins Breather Cover Matters
If you’ve owned a 2007.5–2024 Dodge Ram 2500, 3500, 4500, or 5500 with the 6.7L Cummins long enough, you know that heat, vibration, and time are the hidden enemies under the hood. Right on top of your valve train sits the factory crankcase ventilation (CCV) breather cover, made from standard molded plastic.
Over thousands of thermal cycles, factory plastic breather covers are prone to warping, cracking around bolt holes, and degrading, which creates frustrating oil weeping and ultimately a mess in the engine bay.
At D&J Precision Machine, we set out to create a permanent, premium solution. We designed a 6061-T6 Billet Aluminum Breather Cover built specifically for the 6.7L Cummins platform.
Key Specifications & Compatibility
| Feature | Details |
|---|---|
| Vehicle Fitment | 2007.5–2024 Ram 2500/3500 Pickups & 2500/3500/4500/5500 Cab & Chassis |
| Engine Fitment | 6.7L Cummins Turbo Diesel (All Generations 3.5, 4, 4.5, and 5) |
| Material | Aircraft-grade 6061-T6 Billet Aluminum |
| Emissions Status | 50-State Legal (EMS:4 — retains OEM CCV system, no EO required) |
| Replaces OEM Parts | #68005163AA, #68206037AA, #68443549AA |
| Install Time | Estimated DIY: 30 Minutes |
| Included Accessories | Full stainless steel hardware kit + D&J powder-coated oil cap cover |
What Makes the D&J Billet Breather Cover Different?
1. 50-State Emissions Compliant
Many aftermarket breather modifications or rerouting the catch can may cause emissions compliance headaches or require extra plumbing, custom brackets, and ongoing maintenance.
Our billet breather cover is engineered to be a 100% drop-in replacement that uses your factory CCV system. No catch cans, no external hoses, and no check engine lights. It functions seamlessly within the original emissions framework and is 50-state legal for highway use.
2. Aerospace-Grade 6061-T6 Billet Aluminum
Instead of relying on composite plastics that weaken under high boost and engine temperatures, every D&J Breather Cover is precision CNC-machined in-house from solid 6061-T6 billet aluminum stock.
- Structural Integrity: Holds clamp force evenly across the valve cover seal without bowing.
- Corrosion Resistance: Ships with all stainless steel hardware so rust is never an issue.
- Engine Bay Aesthetics: Clean lines and precise machining turn an uninspiring factory engine bay into a centerpiece.
3. Complete Kit with Custom Oil Cap Cover
We don't leave details half-finished. Each kit comes standard with a D&J powder-coated oil cap cover, unifying your engine bay's look right out of the box.
30-Minute DIY Installation
Upgrading your 6.7 Cummins doesn't require your whole weekend in the garage. Swapping out your factory cover for the D&J Billet Breather Cover takes only around 30 minutes with basic hand tools. Here’s the process:
- Remove Factory Hardware: Unbolt the existing OEM plastic breather cover and carefully clean the mating surface on top of the engine.
- Transfer CCV Components: Ensure your factory CCV element is seated properly inside the new billet housing.
- Torque Down: Using the provided stainless steel fasteners, secure the cover down evenly across the pattern.
- Finish: Press on the included D&J powder-coated oil cap cover, check your work, and fire up your Cummins.
Upgrade Your Cummins Engine Bay Today
Whether you’re repairing a cracked factory plastic housing (OEM #68005163AA / #68206037AA / #68443549AA) or building a clean, high-performance engine bay for the street, work truck, or tow rig, the D&J Billet Breather Cover delivers the perfect balance of form, finish, and reliability.
Order your 2007.5-2024 6.7L Cummins Billet Breather Cover here.
Also available in black powder coat.
