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Wehrli 2001+ GM Duramax LB7/LLY/LBZ/LMM/LML/L5P Billet Oil Fill Cap - Black Anodized
Complete your Duramax engine bay build with the Wehrli Custom Fabrication Billet Oil Fill Cap in Black Anodized Aluminum, compatible with all 2001+ GM Duramax diesel engines — LB7, LLY, LBZ, LMM, LML, and L5P. This CNC-machined billet aluminum oil fill cap replaces the stock plastic cap and adds a custom, professional appearance to your Duramax's top-end components.
The Black Anodized finish gives this cap a sleek, stealth look that complements black engine bay builds, Wehrli black powder-coated intercooler pipes, and other black accessories. It threads in directly in place of the factory cap, sealing securely to prevent oil vapors and leaks. Made in the USA by Wehrli Custom Fabrication, this cap is built to last far longer than the plastic OEM equivalent.
Key Features
- Fits: 2001+ GM Duramax — LB7, LLY, LBZ, LMM, LML, and L5P diesel engines
- CNC-machined billet aluminum construction — stronger and more durable than OEM plastic
- Black anodized finish — sleek, corrosion-resistant, and heat-tolerant
- Direct thread-in replacement — no tools or modifications needed
- Tight sealing design prevents oil leaks and vapor seepage
- Made in the USA by Wehrli Custom Fabrication (WCFab)
- MPN: WCF100443
Simple, functional, and stylish — the Wehrli Black Anodized billet oil fill cap is a great addition to any Duramax build. Pairs perfectly with other Wehrli billet accessories, valve covers, and powder-coated engine components.