Product Description
Upgrade the appearance and durability of your Duramax engine bay with the WEHRLI CUSTOM FAB WCF100443 BILLET OIL FILL CAP – BLACK ANODIZED. Precision CNC machined from high-quality billet aluminum, this premium oil cap replaces the factory plastic cap with a stronger, better-looking upgrade designed specifically for GM Duramax diesel engines from 2001-present.
The Wehrli billet oil cap features a durable black anodized finish that resists corrosion, heat, and oil contamination while giving your engine bay a clean performance appearance. The engraved Wehrli logo provides a subtle but aggressive styling upgrade that complements other Wehrli Custom Fabrication performance components.
This direct replacement cap installs in seconds and fits multiple Duramax generations including LB7, LLY, LBZ, LMM, LML, and L5P engines. Whether you're building a show truck, a high-performance race build, or simply upgrading engine bay details, the WCF100443 oil cap is a simple upgrade with premium quality.
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Key Features
- CNC machined billet aluminum construction
- Durable black anodized finish
- Laser engraved Wehrli Custom Fabrication logo
- Direct replacement for factory plastic oil cap
- Improves durability and engine bay appearance
- Simple installation in seconds
Fitment
- 2001-2004 GM 2500HD / 3500HD 6.6L Duramax LB7
- 2004.5-2005 GM 2500HD / 3500HD 6.6L Duramax LLY
- 2006-2007 GM 2500HD / 3500HD 6.6L Duramax LBZ
- 2007.5-2010 GM 2500HD / 3500HD 6.6L Duramax LMM
- 2011-2016 GM 2500HD / 3500HD 6.6L Duramax LML
- 2017-Present GM 2500HD / 3500HD 6.6L Duramax L5P
Frequently Asked Questions
Is this a direct replacement for the factory oil cap?
Yes. The Wehrli WCF100443 billet oil cap installs directly in place of the factory plastic oil cap with no modifications required.
Will this fit all Duramax engines?
This cap fits all GM Duramax diesel engines from 2001 to present including LB7, LLY, LBZ, LMM, LML, and L5P.
Is the cap vented?
No. This is a sealed oil fill cap designed to replace the factory cap while maintaining the proper sealing function.
Will the anodized finish fade?
The black anodized finish is designed to resist corrosion, heat, and oil exposure for long-lasting durability.
Is installation difficult?
Installation takes only seconds. Simply remove the factory oil cap and install the Wehrli billet cap in its place.
Specifications for WEHRLI CUSTOM FAB WCF100443
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100443 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Material | Billet Aluminum |
| Finish | Black Anodized |
| Shipping Weight | 1 lb |
| Shipping Method | UPS / FedEx Ground |
| Prop 65 Warning | This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information visit https://www.P65Warnings.ca.gov |
