Wehrli Custom Fabrication WCF100417-BB LML Duramax High-Flow Turbo Intake Horn Bengal Blue

The Wehrli Custom Fabrication WCF100417-BB is a high-flow cast aluminum turbo intake horn designed for 2011–2016 Chevrolet/GMC trucks equipped with the 6.6L LML Duramax diesel engine. This CNC-machined cast aluminum horn replaces the restrictive OEM plastic inlet to deliver increased airflow to the turbocharger for improved performance and throttle response. Finished in WCFab's signature Bengal Blue custom powder coat, it adds a bold, show-quality look under the hood.

Key Features:

• 4.8 in. inlet — largest intake horn available for the LML Duramax platform
• 5.6% improvement in airflow over the factory intake horn
• CNC-machined cast aluminum construction for strength and precision fitment
• Includes PCV port for positive crankcase ventilation connection
• Eliminates the OEM resonator connection for a cleaner engine bay and more aggressive turbo/engine sound
• Includes silicone reducer boot and stainless steel T-bolt clamps
• Includes O-ring seal and new EGR gaskets
• Finished in Bengal Blue custom powder coat
• Made in the USA

The WCF100417-BB directly replaces GM part numbers 12642296 and 12637801. It is designed to complement Wehrli's Stage 1 LML Intake Kits and Stage 1 High Flow Bundle Kits. Note: this horn requires use with an intake pipe that accepts a 4-inch boot and clamp — it is not compatible with OEM or aftermarket intakes that use a built-in rubber connection molded directly to the air intake pipe. 2011 model year trucks must update the PCV Regulating Valve to 2012–2016 specification for correct fitment.