Product Description
The WEHRLI CUSTOM FAB WCF100303 4" INTAKE KIT WITH AIR BOX STAGE 2 is a high-performance intake upgrade designed specifically for the 2007.5-2010 LMM Duramax. Wehrli Custom Fabrication engineered this intake system to dramatically improve airflow efficiency while maintaining excellent filtration and engine protection for both performance and daily-driven diesel trucks.
Featuring a large 4-inch mandrel-bent aluminum intake tube and a high-flow performance air filter housed in a precision designed air box, the WCF100303 intake kit delivers smoother airflow to the turbocharger, reducing intake restriction and improving throttle response. The result is improved horsepower potential, quicker turbo spool, and better engine breathing under load.
This kit is built from premium aluminum components and designed for clean installation in the LMM Duramax engine bay. Whether you’re upgrading a work truck, tow rig, or performance build, the Wehrli Stage 2 intake provides a durable and efficient airflow solution trusted by diesel enthusiasts.
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Key Features
- Large 4-inch aluminum intake tubing for improved airflow
- High-flow performance air filter
- Stage 2 enclosed air box design
- Improves turbocharger airflow and response
- Durable aluminum construction
- Direct bolt-on installation
- Designed specifically for LMM Duramax engines
Fitment
- 2007.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
- 2008 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
- 2009 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
- 2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
- 2007.5-2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM
Frequently Asked Questions
What benefits does a 4" intake provide on the LMM Duramax?
A larger intake tube improves airflow to the turbocharger, helping reduce restriction and allowing the engine to breathe more efficiently. This can improve throttle response and support higher horsepower levels.
Does this intake require tuning?
No tuning is required. The intake kit installs directly and works with stock or tuned trucks.
Is the intake kit compatible with factory emissions equipment?
Yes. This intake system is designed to work with factory emissions equipment found on LMM Duramax trucks.
Does the kit include the air filter?
Yes. The Wehrli Stage 2 intake includes a high-flow performance air filter along with the aluminum intake tube and air box.
Is installation difficult?
Installation is straightforward and can typically be completed with basic hand tools in under an hour.
Specifications for WEHRLI CUSTOM FAB WCF100303
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100303 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approximately 12 lbs |
| Package Dimensions | 24 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 |
