Why replace the factory plastic Cummins valve cover with billet aluminum

Factory plastic covers crack over time and have a single-baffle CCV system that allows oil mist into the intake. Billet aluminum covers are leak-proof, run cooler, and typically include dual-baffle CCV routing for cleaner blowby separation.

Which Cummins engines fit the SPELAB Billet Valve Cover?

The cast/billet cover fits 2006–2024 Dodge Ram 2500/3500 with 5.9L or 6.7L Cummins diesel. A separate billet-only version covers 2003–2005 5.9L. Confirm your year and engine before ordering — the two versions are not interchangeable.

What is the difference between the billet and billet/cast valve cover options?

The billet-only version is CNC-machined from solid 6061-T6 aluminum billet — maximum strength, premium finish. The billet/cast option uses a cast aluminum base with billet-machined features — similar durability at a lower price point ($329.99 vs $399).

Does the SPELAB valve cover include a new CCV filter or outlet?

Yes. The cover includes dual CCV outlets designed to route crankcase vapors to an external catch can. This eliminates the factory CCV filter element inside the cover that clogs and restricts airflow on high-mileage Cummins engines.

Will installing a billet valve cover improve throttle response on my 6.7L Cummins?

Yes — customers report improved throttle response after switching, attributed to cleaner crankcase breathing and reduced intake contamination. Billet covers also eliminate the gradual oil seep common with aged OEM gaskets.