Wehrli Custom Fabrication WCF100438-BB Stage High Flow Intake Bundle Kit LMM Duramax - 2

The Wehrli Custom Fabrication Stage 2 High Flow Intake Bundle Kit is a comprehensive performance upgrade designed for 2007.5-2010 Chevrolet Silverado and GMC Sierra trucks equipped with the 6.6L LMM Duramax diesel engine. This complete system combines the popular Stage 1 High Flow Bundle and Stage 2 intake components into a single package, delivering significantly increased airflow for improved turbo efficiency, throttle response, and turbo spool-up.

Air Intake System Components:

• 4-inch mandrel-bent aluminum intake pipe with integrated air box enclosure
• High-flow dry filter assembly with Outerwears pre-filter cover for superior filtration
• 4.8-inch cast aluminum turbo intake horn with integrated PCV port
• Draws cold air through the inner fender for cooler intake temperatures

Intercooler Piping Upgrades:

• 3-inch hot side (driver side) intercooler pipe made from heavy-duty 14-gauge aluminum
• 3.5-inch cold side (passenger side) intercooler pipe with 47% improved airflow over stock
• CNC-machined flanges with double O-ring seals to eliminate boost leaks
• High-quality reinforced silicone boots and stainless steel T-bolt clamps

Y-Bridge System:

• WCFab signature 3-inch two-piece Y-bridge design flows 36% better than stock
• Includes upper crossover and lower intercooler pipes
• Eliminates weak points in factory design that contribute to boost leaks and failures

This Stage 2 kit replaces the restrictive factory plastic components with precision-fabricated aluminum parts for improved engine performance, enhanced turbo sound, and superior durability in hard-working and high-performance applications. All components are manufactured in the USA and finished in WCFab's custom powder coat color for a unique, professional appearance. No tuning required for installation on stock trucks, making this a true bolt-on performance upgrade.

Replaces GM Part Numbers: 15819728, 25881207, 20917396, 25839609, 15855986, 25815549, 98011738