Product Description
Upgrade the appearance and durability of your Cummins engine bay with the WEHRLI CUSTOM FAB WCF100258 BILLET ALUMINUM BRAKE MASTER CYLINDER CAP – BLACK ANODIZED. Designed for 1998-2021 Dodge Ram trucks equipped with the legendary 5.9L or 6.7L Cummins diesel engine, this precision-machined billet cap replaces the factory plastic brake reservoir cap with a premium CNC-machined aluminum upgrade.
Manufactured by Wehrli Custom Fabrication, this cap features a sleek black anodized finish that resists corrosion, heat, and engine bay contaminants while providing a clean, high-end appearance. The direct replacement design ensures a perfect fit on factory brake master cylinder reservoirs while adding a performance-inspired aesthetic to your truck’s engine bay.
Whether you're building a show truck, restoring a clean Cummins engine bay, or simply replacing worn plastic components, the WCF100258 billet brake cap provides a simple yet high-impact upgrade trusted by diesel enthusiasts and performance builders.
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Key Features
- CNC machined billet aluminum construction
- Black anodized corrosion-resistant finish
- Direct replacement for factory brake master cylinder cap
- Improves engine bay appearance
- Precision fit for Dodge Ram Cummins trucks
- Simple installation with factory seal
- Durable upgrade over OEM plastic cap
Fitment
- 1998 Dodge Ram 2500 / 3500 5.9L Cummins
- 1999 Dodge Ram 2500 / 3500 5.9L Cummins
- 2000 Dodge Ram 2500 / 3500 5.9L Cummins
- 2001 Dodge Ram 2500 / 3500 5.9L Cummins
- 2002 Dodge Ram 2500 / 3500 5.9L Cummins
- 2003 Dodge Ram 2500 / 3500 5.9L Cummins
- 2004 Dodge Ram 2500 / 3500 5.9L Cummins
- 2005 Dodge Ram 2500 / 3500 5.9L Cummins
- 2006 Dodge Ram 2500 / 3500 5.9L Cummins
- 2007 Dodge Ram 2500 / 3500 5.9L Cummins
- 2007.5 Dodge Ram 2500 / 3500 6.7L Cummins
- 2008-2021 Dodge Ram 2500 / 3500 6.7L Cummins
Installation Note: This billet cap installs directly onto the factory brake master cylinder reservoir using the OEM seal and threads.
Frequently Asked Questions
What is the purpose of this billet brake master cylinder cap?
This cap replaces the factory plastic brake reservoir cap with a stronger billet aluminum version while improving the overall appearance of your engine bay.
Is this cap a direct replacement for the factory cap?
Yes. The Wehrli WCF100258 cap is designed to thread directly onto the factory brake master cylinder reservoir for a simple bolt-on installation.
Will this fit both 5.9L and 6.7L Cummins engines?
Yes. This cap fits Dodge Ram trucks equipped with either the 5.9L Cummins (1998-2007) or the 6.7L Cummins (2007.5-2021).
Does this affect braking performance?
No. This component is purely an upgraded cap and does not alter brake system performance.
Is the finish durable under hood?
Yes. The black anodized coating protects the billet aluminum from corrosion, heat, and engine bay contaminants.
Specifications for WEHRLI CUSTOM FAB WCF100258
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100258 |
| Material | CNC Machined Billet Aluminum |
| Finish | Black Anodized |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| 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 |
