Wehrli 4in Intake Kit Duramax LML 11-16 Stage 2 | Chevy (WCF100304-GB)

The Wehrli 11-16 Chevrolet 6.6L Duramax LML Stage 2 Intake Kit is a high-performance upgrade designed to enhance airflow and engine efficiency. Constructed with fabricated aluminum, this intake system features a large diameter 4-inch pipe with smooth aerodynamic bends to increase air velocity and volume, resulting in improved horsepower, torque, and quicker throttle response. The kit includes an air box enclosure with a dry filter assembly that draws cold air through the inner fender, helping to lower intake temperatures and promote cooler, denser air intake. Additional features include a high-flow 4.8-inch cast aluminum turbo intake horn that reduces restrictions, improves turbo spool, and delivers a more aggressive turbo sound. Durable hardware, silicone boots, seals, and stainless steel clamps ensure long-lasting performance and ease of installation, while the removable air box lid allows for simple filter inspection and maintenance.

Designed for 2011-2016 Chevrolet Silverado and GMC Sierra trucks equipped with the 6.6L Duramax LML engine, this Stage 2 intake kit is a direct bolt-on upgrade that replaces the restrictive factory parts. It is compatible with OEM and upgraded VGT turbochargers but not with aftermarket LML Y-bridges that alter the manifold inlet location. The kit is finished in your choice of WCFab's signature custom powder coat colors for a personalized look. Suitable for street and performance applications, this intake system improves airflow, turbo response, and overall engine performance, making it ideal for daily driving, towing, or enthusiast tuning. Proper fitment requires updating the PCV regulating valve on 2011 models to the 2012-2016 specification for compatibility.