Wehrli WCF100412-GB 4.8in High Flow Turbo Intake Horn for 06-10 LBZ/LMM

Vehicle Fitment

• 2006-2010 Chevrolet Silverado 2500 HD / 3500 HD, 6.6L LBZ/LMM Duramax
• 2006-2010 GMC Sierra 2500 HD / 3500 HD, 6.6L LBZ/LMM Duramax
• 2006-2010 Chevrolet Express 2500 / 3500, 6.6L LBZ/LMM Duramax
• 2006-2010 GMC Savana 2500 / 3500, 6.6L LBZ/LMM Duramax

Fitment Notes

• Not compatible with OEM or aftermarket intake systems that have the boot connection molded directly to the intake pipe (non-removable)
• Compatible with intakes that use a silicone boot and two clamps for the horn connection

Features

• Replaces the restrictive OEM plastic turbo inlet horn for a significant increase in airflow to the turbo
• 4.8" inlet - the largest intake horn on the market for this platform
• Delivers a 20% airflow improvement over the stock horn
• CNC machined cast aluminum construction
• Includes a PCV port and eliminates the factory resonator connection for a cleaner setup and more aggressive turbo sound
• Finished in gloss black powder coat
• No tuning required for installation, though tuning can help maximize the airflow gains

Specifications

• Inlet diameter: 4.8"
• Material: CNC machined cast aluminum
• Finish: Gloss black powder coat

Included Components

• 1x Turbo inlet horn with PCV port
• Silicone reducer boot
• Stainless steel T-bolt clamps
• O-ring seal

Product Description

The factory plastic turbo inlet on the LBZ/LMM is a known airflow bottleneck, and this cast aluminum horn addresses it directly with a massive 4.8" inlet - the largest available for this platform - delivering a 20% airflow improvement over stock. That translates to quicker turbo spool and improved throttle response, whether you're running factory boost levels or building toward more.

Finished in gloss black and eliminating the OEM resonator connection, it cleans up the engine bay while adding a more aggressive turbo and engine sound under acceleration. No tuning is required to install it, though pairing it with a tune can help you extract the full benefit of the added airflow. Just confirm your intake uses a removable silicone boot connection rather than a molded one before ordering.