Wehrli Custom Fabrication WCF100417-BG High Flow Turbo Intake Horn - Bengal Green

The Wehrli Custom Fabrication WCF100417-BG High Flow Turbo Intake Horn is a precision-engineered cast aluminum upgrade designed to replace the restrictive OEM plastic inlet on the 2011–2016 GM 6.6L LML Duramax diesel engine. Finished in Wehrli's signature Bengal Green custom powder coat, this intake horn delivers both aggressive underhood style and real performance gains.

With a 4.8-inch inlet — the largest intake horn available for the LML platform — this horn flows significantly more air than stock, resulting in improved turbo response, throttle feel, and overall engine efficiency. The CNC machined cast aluminum construction ensures long-term durability and precise fitment every time.

Key Features:

• 4.8-inch inlet — largest on the market for the LML Duramax platform
• CNC machined cast aluminum construction for precision and durability
• 5.6% improvement in airflow over stock OEM horn
• Includes integrated PCV port for retained factory CCV routing
• Eliminates the factory resonator for a more aggressive turbo and exhaust note
• Includes silicone reducer boot and stainless steel T-bolt clamps
• Includes O-ring seal and new EGR gaskets
• Custom Bengal Green powder coat finish
• Replaces GM OEM Part Numbers: 12642296 and 12637801
• Made in the USA

Compatibility Note: This intake horn requires an intake pipe that connects via a 4-inch silicone boot and clamps. It is not compatible with OEM-style or aftermarket intakes (such as K&N) that use a built-in rubber molded connection. Also not compatible with aftermarket LML Y-bridges that relocate the manifold inlet from the factory driver-side position. 2011 model year trucks must update the PCV Regulating Valve to 2012–2016 specification for correct fitment.

Designed to complement WCFab's Stage 1 LML Intake Kits and Stage 1 High Flow Bundle Kits, the WCF100417-BG is a bolt-on performance upgrade proudly made in the USA.