Wehrli Custom Fabrication WCF100439-IBB Stage 2 High Flow Intake Bundle Kit 2011-2016 LML Duramax

The Wehrli Custom Fabrication Stage 2 High Flow Intake Bundle Kit is a comprehensive performance upgrade designed for 2011-2016 GM Sierra and Silverado 2500HD/3500HD trucks equipped with the 6.6L LML Duramax diesel engine. This complete airflow solution combines proven intake and intercooler components to maximize engine performance, throttle response, and turbo efficiency.

Key Features:

• 4-inch high-flow intake pipe delivers 37% more airflow compared to restrictive factory components
• 4.8-inch cast aluminum turbo intake horn provides 5.6% additional airflow improvement over stock
• Heavy-duty air box and lid constructed from 10-gauge aluminum sheet for durability and optimal airflow
• 3-inch hot side and cold side intercooler pipes replace weak factory units prone to splitting under boost
• Precision CNC-machined Y-bridge with 3-inch upper crossover pipe increases total airflow by 33%
• Dry air filter with Outerwears pre-filter cover for maximum protection and easy maintenance
• 14-gauge heavy-duty aluminum construction with mandrel-bent piping throughout
• CNC-machined flanges with double O-ring seals eliminate boost leaks
• Custom powder coat finish available in multiple color options
• Complete bolt-on installation with all necessary hardware, silicone boots, and stainless steel T-bolt clamps

Performance Benefits:

• Improved horsepower and torque across the powerband
• Enhanced throttle response and faster turbo spool-up
• Cooler intake air temperatures for increased efficiency
• More aggressive turbo sound during acceleration
• Eliminates factory resonator for cleaner engine bay appearance

This Stage 2 bundle requires no tuning and installs with basic hand tools. The sealed air box design draws cold, dense air from the inner fender area, while the enlarged intercooler piping maintains consistent boost pressure for improved performance in daily driving, towing, and performance applications. Proudly made in the USA with WCFab's signature quality and precision fitment.

Note: This product cannot be shipped to California.