Product Description
The WEHRLI CUSTOM FAB WCF100189 CRANKCASE VENT (PCV) FITTING KIT is a simple but highly effective upgrade for 2004.5-2010 Duramax LLY, LBZ, and LMM engines. Designed by Wehrli Custom Fabrication, this billet aluminum fitting replaces the factory crankcase vent connection and allows for custom PCV routing, catch-can setups, or improved crankcase ventilation systems.
Machined from high-quality billet aluminum and finished in a durable black anodized coating, this fitting provides a clean, professional solution for builders looking to upgrade their Duramax crankcase ventilation system. The precision-machined AN-style connection allows easy installation of custom vent hoses or breather systems, helping reduce oil mist buildup in the intake and intercooler piping.
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Key Features
- Precision machined billet aluminum construction
- Durable black anodized finish
- Allows custom crankcase vent routing
- Compatible with catch cans and custom breather systems
- Direct replacement style installation
- Designed specifically for Duramax LLY, LBZ, and LMM engines
Fitment
- 2004.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
- 2005 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
- 2006 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
- 2007 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
- 2007.5-2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
- 2004.5-2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax LLY / LBZ / LMM
Frequently Asked Questions
What does the crankcase vent fitting upgrade do?
This fitting allows you to route the crankcase vent line to a catch can, breather filter, or custom PCV system rather than routing oily vapors back into the intake system.
Is this a direct bolt-on installation?
Yes. The billet fitting installs in place of the factory crankcase vent fitting and allows you to attach AN-style hoses or custom ventilation systems.
Does this kit include hoses or a catch can?
No. The WCF100189 kit includes the billet fitting only. Additional hoses, breathers, or catch cans can be added depending on your setup.
Will this help reduce oil buildup in intercooler piping?
Yes. Rerouting crankcase ventilation can significantly reduce the amount of oil vapor entering the intake system and intercooler.
Is this product emissions compliant?
This product is intended for off-road or performance applications and may not be emissions compliant in all regions.
Specifications for WEHRLI CUSTOM FAB WCF100189
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100189 |
| 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 |
