Product Description
Increase airflow, improve turbo efficiency, and enhance engine bay appearance with the WEHRLI CUSTOM FAB WCF100684 STAGE 2 4" INTAKE KIT WITH AIR BOX for the 2020-2024 L5P Duramax. This high-performance intake system replaces the restrictive factory intake components with a larger mandrel-bent 4-inch aluminum intake tube and sealed air box design that maximizes airflow to the turbocharger.
Engineered and manufactured by Wehrli Custom Fabrication, this Stage 2 intake kit provides improved airflow efficiency while maintaining proper filtration and engine bay heat control. The system features a precision-fabricated aluminum intake tube, high-flow performance air filter, and a sealed air box to ensure cool air delivery for consistent performance under heavy load or high horsepower applications.
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Key Features
- Large 4" mandrel-bent aluminum intake tube for maximum airflow
- Stage 2 sealed air box design for cooler intake air
- High-flow performance air filter included
- Improves turbo efficiency and throttle response
- Durable powder-coated aluminum construction
- Direct bolt-on installation using factory mounting points
- Enhanced turbo sound and airflow performance
Fitment
- 2020 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2020 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2021 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2021 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2022 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2022 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2023 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2023 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2024 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2024 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2020-2024 GMC Sierra 2500HD / 3500HD 6.6L Duramax L5P
Installation Note: This intake system installs using factory mounting points and requires no cutting or permanent modifications to the truck.
Frequently Asked Questions
What is the difference between Stage 1 and Stage 2 Wehrli intakes?
The Stage 2 intake includes a sealed air box system for improved heat shielding and cooler intake air compared to open-element Stage 1 systems.
Will this intake increase horsepower?
While gains depend on the truck's overall setup, improved airflow to the turbocharger can enhance throttle response and support higher horsepower levels when combined with tuning and other performance upgrades.
Does this kit require tuning?
No tuning is required for installation. The intake system works with factory engine calibration.
Is the air filter reusable?
Yes. The included high-flow performance filter is washable and reusable with proper cleaning and maintenance.
Does this intake increase turbo sound?
Yes. The larger intake tube and improved airflow often result in more noticeable turbo spool sound during acceleration.
Specifications for WEHRLI CUSTOM FAB WCF100684
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100684 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approx. 12 lbs |
| Package Dimensions | 22 x 14 x 12 inches |
| 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 |
