Wehrli 100712 High Flow Intake Bundle Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Wehrli WCF100712 High Flow Intake Bundle Kit | 01-04 GM 2500HD/3500HD 6.6L Duramax LB7

Unlock Airflow and Maximize LB7 Performance
The Wehrli WCF100712 High Flow Intake Bundle Kit is designed to significantly improve airflow to your 2001–2004 GM 6.6L Duramax LB7. This all-in-one upgrade replaces restrictive factory components with high-performance, mandrel-bent aluminum tubing and a large, high-flow filter to increase power, throttle response, and overall engine efficiency.

Built for Power and Efficiency
With its high-flow 4” intake and smooth airflow path, this bundle reduces restriction and helps your turbo spool faster. Whether you’re towing heavy loads or building a high-horsepower Duramax, this kit supports improved combustion and cooler intake temps—key factors in achieving better fuel economy and horsepower gains.

Dyno-Tested for Real Results
Expect measurable improvements in horsepower, torque, and throttle response after installing this kit. When paired with tuning and additional bolt-ons, the Wehrli intake system provides a solid foundation for long-term performance growth on your LB7.

Engineered for Durability and Style
Crafted from TIG-welded aluminum and finished in a durable powder coat, the Wehrli intake system not only performs great but also looks sharp under the hood. It’s built to withstand the heat and demands of heavy-duty use.

Simple Installation, No Tuning Required
This bundle is a direct bolt-on and includes all necessary couplers, clamps, and hardware. Installation requires basic tools and takes roughly 1–2 hours. No tuning is needed—just bolt it on and feel the difference.

• Increases airflow and turbo efficiency

• Supports gains in horsepower and torque

• Powder-coated 4” aluminum intake tubing

• High-flow reusable air filter

• Improves throttle response and lowers EGTs

• No tuning required

• Easy bolt-on installation

Kit Includes:

• 4” intake tube

• High-flow oiled air filter

• Intake horn / Y-bridge components

• Silicone couplers and clamps

• Complete installation hardware

Fitment: 2001, 2002, 2003, 2004 GM 2500HD / 3500HD 6.6L Duramax LB7
Warranty: Manufacturer’s limited warranty
Fitment Notes: Designed specifically for LB7 trucks. Not CARB-certified for emissions compliance in California.