Wehrli Custom Fabrication WCF100417-GW High-Flow Turbo Intake Horn Gloss White

The Wehrli Custom Fabrication WCF100417-GW High-Flow Turbo Intake Horn is a performance upgrade designed to replace the restrictive OEM plastic inlet on 2011-2016 LML Duramax engines. This CNC machined cast aluminum intake horn features a massive 4.8-inch inlet—the largest on the market—delivering a 5.6% improvement in airflow over stock for increased horsepower, torque, and improved throttle response.

Key Features:

• 4.8-inch inlet diameter for maximum airflow to turbocharger
• CNC machined cast aluminum construction for durability
• Integrated PCV port for proper crankcase ventilation
• Eliminates restrictive resonator connection for improved engine sound
• Custom Gloss White powder coat finish for show-quality appearance
• Includes silicone reducer boot and stainless steel T-bolt clamps
• O-ring seal and new EGR gaskets included for leak-free installation
• Made in USA with precision manufacturing

This direct-fit upgrade is designed to complement WCFab Stage 1 intake kits and high-flow bundle kits. It replaces GM part numbers 12642296 and 12637801. Note: This horn requires an intake system that uses a 4-inch silicone boot and clamp connection. Not compatible with OEM or aftermarket intakes with molded rubber connections. 2011 model year trucks require updated PCV regulating valve to 2012-2016 specification for proper fitment.