Driving Innovation In Diesel Performance

Billet Valve Covers. Built for Cummins.

Billet valve covers for 5.9L & 6.7L Cummins. Choose your year range and finish for a billet look that belongs on a Cummins.

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Price $608.99
03-05 Dodge Cummins Billet Valve Cover

03-05 Dodge Cummins Billet Valve Cover

  • 6061-T6 billet aluminum
  • Breather strategy designed to help manage oil mist under load
  • Billet oil cap cover, for a sleek finished look
  • Raw Finish
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Price $734.99
Billet Valve Cover 03-05 Black Powder Coat

Billet Valve Cover 03-05 Black Powder Coat

  • 6061-T6 billet aluminum
  • Breather strategy designed to help manage oil mist under load
  • Billet oil cap cover, for a sleek finished look
  • Black Powder Coat Finish
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Price $734.99
Billet Valve Cover 2006 - Present Year Black Powder Coat

Billet Valve Cover 2006 - Present Year Black Powder Coat

  • 6061-T6 billet aluminum
  • Breather strategy designed to help manage oil mist under load
  • Billet oil cap cover, for a sleek finished look
  • Black Powder Coat Finish
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Price $608.99
Billet Valve Cover 06 to Present Raw Finish

Billet Valve Cover 06 to Present Raw Finish

  • 6061-T6 billet aluminum
  • Breather strategy designed to help manage oil mist under load
  • Billet oil cap cover, for a sleek finished look
  • Raw Finish
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Price $41.98
Powder Coated Billet D&J Precision Machine Oil Cap Cover

Powder Coated Billet D&J Precision Machine Oil Cap Cover

  • Matches the D&J billet valve cover look
  • D&J logo engraving
  • Designed to re-use your stock oil cap
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What’s in the box

Quick look at what you’ll receive and how it’s packaged.

KNOWLEDGE HUB

Everything you need to know about D&J Cummins billet valve covers

D&J billet valve covers are built for real diesel use: correct fitment by year-range, stable sealing, and a breather strategy that helps manage crankcase vapor and oil mist under towing, work cycles, and sustained load. If you want billet that actually belongs on a Cummins, this is it.

  • Instant fitment clarity The correct year range is called out in the product title/options so you can order once and be done.
  • Breather-focused design Designed to help control oil mist and keep things cleaner under load where crankcase vapor increases.
  • Billet durability Rigid, stable sealing surface and premium machining — built for real diesel use, not shelf display.
  • Clean install Thought-through routing/clearance and a “do it once” approach that matches D&J’s Cummins program.
  • Finish options Raw billet or black (model dependent) to match your build style and how you want the engine bay to present.

FAQs

How do I pick the right valve cover?
Use the year range called out in the product title/options. For swapped trucks, match the engine/cover configuration you actually have.
Will these fix blow-by?
No part fixes blow-by. These covers help manage oil mist and routing more cleanly, but blow-by volume depends on engine condition and can indicate internal wear.
What does the breather strategy help with?
Cleaner control of crankcase vapor and oil mist under load to reduce mess and help the system behave more consistently in real diesel use.
Do these work for towing/work trucks?
Yes, that’s exactly the use case. The design focus is durability, sealing stability, and cleaner vapor management under load.
Does it reuse the stock oil cap?
Yes, the setup is designed to re-use your stock oil cap (as called out on the product pages).
Raw or black — which should I choose?
Raw for the classic billet look; black for a cleaner OE+ look and better grime-hiding on daily/work trucks (model dependent).
Does this fit a 6.7L Cummins valve cover application?
Yes—if your truck is a 6.7L Cummins, select the correct year-range option on the page to match your engine’s fitment.
Does this fit a 5.9L Cummins valve cover application?
Yes—if you have a 5.9L Cummins, choose the year-range option that matches your truck/engine. Fitment is tied to the year range you select.
Is this for Dodge/Ram Cummins trucks (2500/3500)?
These billet valve covers are intended for Cummins-equipped trucks—use the year-range selector to match your specific model year and configuration.