Wehrli Custom Fabrication WCF100503-GB LBZ Duramax Stage 3 High Flow Intake Bundle Kit Galaxy Blue

The Wehrli Custom Fabrication WCF100503-GB is a comprehensive Stage 3 High Flow Intake Bundle Kit designed for the 2006–2007 Chevrolet/GMC 6.6L Duramax LBZ diesel engine. Finished in WCFab's signature Galaxy Blue powder coat, this all-in-one kit replaces the factory's most restrictive intake and intercooler components with precision-engineered, heavy-duty aluminum upgrades that significantly improve airflow, throttle response, and overall engine efficiency.

This Stage 3 bundle represents WCFab's most complete bolt-on air management upgrade for the LBZ platform, combining intake and intercooler pipe improvements into a single cohesive kit. Every component is proudly made in the USA and finished with WCFab's durable powder coating for long-lasting protection and a show-quality appearance.

Kit Includes:

• 4-inch aluminum intake pipe with integrated air box enclosure for maximum pre-turbo airflow
• Dry filter assembly with Outerwears pre-filter cover to protect the MAF sensor, turbo, and engine from contaminants
• 4.8-inch intake horn with PCV port for improved turbo inlet flow
• 3-inch hot side (driver side) intercooler pipe — mandrel-bent, 14-gauge aluminum construction
• 3.5-inch cold side (passenger side) intercooler pipe — eliminates restrictive factory resonator and leak-prone OEM plastic/rubber sections
• High-quality reinforced silicone boots and stainless steel T-bolt clamps for superior boost pressure retention and temperature resistance
• All necessary installation hardware included

Key Features:

• Significant airflow gains over restrictive stock intake and intercooler piping
• 14-gauge mandrel-bent aluminum construction for durability and optimized flow
• Air box and lid constructed from heavy-duty 10-gauge aluminum sheet
• Galaxy Blue (-GB) durable powder coat finish
• No tuning required — direct bolt-on installation
• Made in the USA by Wehrli Custom Fabrication (WCFab), DeKalb, Illinois
• This product cannot ship to the state of California

The WCF100503-GB Stage 3 bundle is the ideal upgrade for LBZ Duramax owners seeking maximum intake system performance in a single, color-matched kit. The Galaxy Blue powder coat finish adds a distinctive, custom look under the hood to match the high-performance engineering within.