Product Description
Improve airflow and eliminate the restrictive factory intake resonator with the WEHRLI CUSTOM FAB WCF100709 4" INTAKE RESONATOR PIPE for the 2017-2019 L5P Duramax platform. The factory intake resonator is designed to reduce turbo noise but creates unnecessary airflow restriction within the intake tract. This precision-fabricated upgrade pipe replaces the bulky factory resonator with a smooth 4-inch aluminum intake tube to improve airflow efficiency and enhance turbo sound.
Manufactured by Wehrli Custom Fabrication, this high-quality intake resonator pipe is built from mandrel-formed aluminum and engineered for a perfect bolt-in fit. It maintains factory intake routing while significantly improving airflow between the airbox and turbocharger. The result is improved throttle response, better turbo efficiency, and a cleaner engine bay appearance.
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Key Features
- Removes restrictive factory intake resonator
- Large diameter 4" mandrel-formed aluminum intake pipe
- Improves intake airflow and turbo efficiency
- Enhances turbo spool sound
- Direct bolt-in replacement for factory resonator assembly
- High quality welded aluminum construction
- Designed specifically for L5P Duramax engine platforms
Fitment
- 2017 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2017 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2018 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2018 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2019 Chevrolet Silverado 2500HD 6.6L Duramax L5P
- 2019 Chevrolet Silverado 3500HD 6.6L Duramax L5P
- 2017-2019 GMC Sierra 2500HD 6.6L Duramax L5P
- 2017-2019 GMC Sierra 3500HD 6.6L Duramax L5P
Installation Note: This pipe replaces the factory intake resonator assembly and retains compatibility with the OEM airbox and intake system.
Frequently Asked Questions
What does an intake resonator do on the L5P Duramax?
The factory resonator is designed to reduce turbo noise but also restricts airflow. Replacing it with a straight intake pipe improves airflow and increases turbo sound.
Will this increase horsepower?
While horsepower gains alone are minimal, the improved airflow supports performance upgrades and allows the turbocharger to operate more efficiently.
Does this require tuning?
No tuning is required. This is a simple bolt-on airflow upgrade compatible with stock engine tuning.
Will this work with aftermarket intake systems?
Yes, the Wehrli intake resonator pipe is compatible with most aftermarket intake systems designed for the L5P Duramax.
Does this change the turbo sound?
Yes. Removing the resonator allows more turbo spool sound to be heard during acceleration.
Specifications for WEHRLI CUSTOM FAB WCF100709
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100709 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Material | Mandrel-formed Aluminum |
| Diameter | 4 Inch |
| Shipping Weight | Approximately 4 lbs |
| Package Dimensions | 20 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 |
