Description
—tab Description—
Description
Upgrade your 2004.5–2010 GM LLY LBZ LMM 6.6L Duramax with a billet aluminum valve cover engineered for strength, sealing, and performance builds. The stock cast cover can crack, warp, or leak under heavy towing, high heat, or tuned engines. This CNC-machined replacement is 19.5mm thick, ensuring rigidity, improved sealing, and long-term durability. Designed with PCV flexibility, it allows reroute or delete configurations to reduce oil vapor re-entry into the intake. Ideal for performance builds, heavy haulers, or OEM replacements, this cover combines functional reliability with a clean, anodized finish for an upgraded engine bay appearance.
Fitments
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2004.5–2010 GM LLY LBZ LMM Chevrolet/GMC 2500HD 3500HD 6.6L Duramax Diesel Engines
Key Features
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Billet Aluminum Construction
Stronger and more durable than OEM cast aluminum, resisting warping and cracking. -
CNC Precision, 19.5mm Thickness
Reinforced structure ensures better sealing and deformation resistance. -
PCV Options
Includes dual fittings for reroute or external catch-can setups, reducing oil vapor contamination in the intake system. -
New Mounting Hardware
Comes with a complete set of installation bolts.
Specifications
| Material | Billet Aluminum (CNC-machined) |
| Thickness | 19.5mm |
| Weight | 6.19 kg |
| Installation Location | Engine top – replaces factory valve cover |
| Fitment | OEM bolt-on design |
—tab FAQ—
FAQs
Q: Why replace the OEM valve cover?
A: Stock covers are prone to cracking, leaking, and poor sealing under heat or pressure. This billet cover is stronger, thicker, and designed to handle performance or heavy-duty use.
Q: Does this include a new gasket?
A: No, a new gasket is not included. You’ll need to reuse or replace the factory gasket during installation.
Q: Can I retain the OEM fuel filter bracket?
A: No. This cover does not have the factory standoffs. Bracket or harness modifications are required if you plan to reuse the OEM fuel filter mount.
Q: What are the PCV options?
A: The cover has two fittings—allowing you to reroute gases to a catch can, vent them to atmosphere, or adapt to your custom setup.
Q: Does this product comply with emissions regulations?
A: Since it modifies the PCV system, compliance depends on your local laws. Always check regulations before installation.
Q: Will it improve engine performance?
A: Indirectly. By preventing leaks and reducing oil vapor in the intake, it helps maintain turbo efficiency, intake cleanliness, and overall reliability.
Q: Is installation difficult?
A: It’s a direct bolt-on to the cylinder head, but due to PCV and bracket modifications, professional installation is recommended.
Q: What finish options are available?
A: Black, red, and silver anodized finishes, offering both durability and visual appeal.
Q: Can I use this as an OEM replacement?
A: Yes, it’s a suitable upgrade when replacing cracked, leaking, or warped OEM covers, even for daily use.
Q: Does it work with aftermarket intakes?
A: Yes. If deleting the PCV port, pairing with a PCV-less intake horn is recommended for a cleaner setup.
—tab Shipping & Returns—
Fast Shipping Policy
Your order will be dispatched within 1-2 business days, and the package will arrive within your order’s estimated date. Click for Shipping Policy
Easy Return Policy
Every order comes with a 14-day free return, which means you don’t have to pay for a return slip. Click for Return Policy
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