More air means more power for your Duramax! Get better throttle response and more horsepower under heavy load with Wehrli Custom Fabrication's 4" Cold Air Intake Kit.

NOTE: While some colors are kept in stock, other colors will take an extra 10-15 business day delay in powder coating.

If you’re looking to unlock more performance from your LBZ Duramax, improving airflow is one of the most effective upgrades you can make. The  LBZ Duramax Cold Air Intake Kit with Air Box is designed to increase airflow, improve throttle response, and give your engine bay a clean, custom appearance.

This system replaces the restrictive factory intake with a high-flow intake tube and sealed air box, helping deliver cooler, denser air to your turbocharger. The result is improved efficiency, better throttle response, and more consistent performance especially under load or while towing.

Built from high-quality fabricated materials, this intake kit is engineered for durability and long-term reliability. The sealed air box helps minimize heat soak from the engine bay, ensuring your LBZ gets the coolest air possible for optimal combustion.

Finished in your choice of WCFab custom powder coat colors, this intake not only performs it adds a standout look every time you pop the hood.