Product Description
Improve intake airflow and eliminate the restrictive factory resonator with the WEHRLI CUSTOM FAB WCF100720 4" INTAKE RESONATOR PIPE for the 2020-2024 L5P Duramax. Designed and manufactured by Wehrli Custom Fabrication, this precision-built aluminum pipe replaces the bulky OEM intake resonator with a smooth-flowing 4-inch intake tube that enhances airflow, improves turbo response, and cleans up the engine bay.
The factory intake resonator is designed primarily for noise reduction but creates unnecessary airflow restrictions in high-performance applications. Wehrli’s upgraded resonator pipe removes that bottleneck, allowing the turbocharger to breathe more freely while maintaining proper fitment with the stock intake system or most aftermarket intake kits. The result is improved throttle response, increased airflow efficiency, and a cleaner engine bay appearance.
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Key Features
- Replaces restrictive factory intake resonator
- Large 4" diameter intake pipe for improved airflow
- Precision fabricated aluminum construction
- Direct bolt-on installation
- Compatible with factory or aftermarket intake systems
- Improves turbocharger airflow and response
- Enhances engine bay appearance
- Engineered specifically for L5P Duramax trucks
Fitment
- 2020 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax L5P
- 2021 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax L5P
- 2022 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax L5P
- 2023 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax L5P
- 2024 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax L5P
- 2020-2024 GMC Sierra 2500HD / 3500HD 6.6L Duramax L5P
Frequently Asked Questions
What does the intake resonator do?
The factory resonator reduces intake noise but also creates airflow restrictions. Removing it allows smoother airflow to the turbocharger.
Will this increase horsepower?
While gains depend on the overall setup, improving intake airflow can support better turbo efficiency and performance.
Is tuning required to install this pipe?
No tuning is required. The Wehrli resonator pipe installs directly in place of the factory component.
Will this work with aftermarket intake systems?
Yes. The pipe is designed to work with the factory intake and most aftermarket intake systems designed for the L5P Duramax.
Is installation difficult?
Installation is straightforward and can typically be completed with basic hand tools in under an hour.
Specifications for WEHRLI CUSTOM FAB WCF100720
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100720 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approx. 5 lbs |
| Package Dimensions | 24 x 10 x 8 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 |
