Wehrli Custom Fabrication WCF100437-RED LBZ Duramax Stage 2 High Flow Intake Bundle Kit - WCFab Red

The Wehrli Custom Fabrication WCF100437-RED Stage 2 High Flow Intake Bundle Kit is a comprehensive performance upgrade for the 2006–2007 LBZ 6.6L Duramax diesel engine. This all-in-one kit combines the Stage 1 High Flow Bundle with the Stage 2 intercooler pipe upgrades into a single package, delivering increased airflow for improved efficiency, throttle response, and faster turbo spool-up. Finished in WCFab's signature WCFab Red powder coat, this kit eliminates the weak points in the factory intake and charge piping design that can contribute to power loss, boost leaks, and complete component failures in demanding high-performance and hard-working applications.

Intake Side Components:

• 4 in. aluminum intake pipe with integrated air box enclosure and dry filter assembly
• Outerwears pre-filter cover — hydrophobic design keeps MAF sensor, turbo, and engine airways contaminant-free
• 4.8 in. turbo intake horn with PCV port — the largest on the market, providing a 20% airflow improvement over stock
• Draws cold air through the inner fender for cooler intake temperatures and improved horsepower and torque
• All-aluminum 14 ga. construction with large-diameter piping and smooth aerodynamic bends for increased intake air velocity and volume
• Provides a more aggressive engine and turbo sound during acceleration

Intercooler Pipe Components (Stage 2):

• 3 in. Driver (Hot) Side Intercooler Pipe — replaces the restrictive factory 2.5 in. pipe; includes reinforced silicone boots and stainless steel T-bolt clamps for superior temperature resistance and boost pressure retention
• 3.5 in. Passenger (Cold) Side Intercooler Pipe — replaces the leak-prone factory plastic/rubber pipe; delivers a 47% airflow improvement over stock
• Made in the USA from heavy-duty 14 ga. aluminum tube with smooth, aerodynamic mandrel bends
• CNC machined flanges with double O-ring seals and upgraded silicone hump boot to withstand elevated boost pressures and eliminate boost leaks

Key Features:

• Complete Stage 1 + Stage 2 bundle in a single kit
• WCFab Red powder coat finish
• Heavy-duty 14 ga. aluminum construction throughout
• High-quality silicone boots, stainless steel T-bolt clamps, and O-ring seals included
• Removable air box lid for easy filter inspection and maintenance
• Made in the USA

The WCF100437-RED Stage 2 High Flow Bundle Kit is the definitive intake and intercooler piping upgrade for 2006–2007 LBZ Duramax owners looking to maximize airflow, eliminate factory failure points, and add a bold WCFab Red finish under the hood.