Wehrli Custom Fabrication WCF100417-GRY High Flow Turbo Intake Horn - Grey

The Wehrli Custom Fabrication WCF100417-GRY is a 4.8-inch High Flow Cast Aluminum Turbo Intake Horn finished in WCFab's signature Grey powder coat. This direct-replacement intake horn is CNC machined from cast aluminum and engineered to replace the restrictive OEM plastic inlet on the 2011–2016 GM 6.6L LML Duramax diesel, delivering measurably improved airflow to the turbocharger for stronger throttle response and better overall performance.

Key Features:

• 4.8-inch inlet — the largest intake horn on the market for this application
• CNC machined cast aluminum construction for precision fitment and long-term durability
• Delivers a 5.6% improvement in airflow over the stock intake horn
• Integrated PCV port maintains proper crankcase ventilation
• Eliminates the factory resonator connection for a cleaner engine bay appearance and a more aggressive turbo and engine sound
• Includes silicone reducer boot and stainless steel T-bolt clamps for a secure, leak-free connection
• Includes O-ring seal and new EGR gaskets for a complete installation
• Custom Grey (GRY) powder coat finish — coordinates with WCFab's full line of color-matched intake and intercooler components
• Designed and manufactured in the USA by Wehrli Custom Fabrication
• Replaces GM OEM part numbers 12642296 and 12637801

The WCF100417-GRY is designed to complement WCFab's Stage 1 LML Intake Kits and Stage 1 High Flow Bundle Kits, making it an ideal standalone upgrade or part of a broader intake system build. Note: requires an intake pipe that accepts a 4-inch silicone boot and clamp connection. Not compatible with OEM-style or aftermarket intakes that use a molded rubber slip-on connection at the horn.