Wehrli Custom Fabrication WCF100304-IBB LML Duramax 4" Stage 2 Intake Kit Illusion Blueberry

The Wehrli Custom Fabrication Stage 2 Cold Air Intake Kit is a high-flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly that replaces the restrictive plastic factory parts on LML Duramax engines for improved engine performance. The new design significantly increases airflow to your turbo, producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the inner fender. This kit is finished in Wehrli's stunning Illusion Blueberry custom powder coat for a distinctive appearance.

Performance Features:

• 37% improvement in air flow over stock intake
• 5.6% improvement in air flow over stock intake horn
• Large diameter 4-inch piping with smooth aerodynamic bends to improve intake air velocity and volume
• Provides more aggressive engine and turbo sound during acceleration
• No tuning required, bolt-on installation

Construction & Components:

• Air box and lid constructed of 10-gauge aluminum sheet
• 14-gauge aluminum intake pipe construction
• Dry air filter with Outerwear's hydrophobic pre-filter cover
• High-quality silicone boots, seals, and stainless steel T-bolt clamps
• Removable air box lid element allows for easy visual inspection and maintenance
• Made in USA with custom powder coat finish
• Complete installation hardware included

Installs easily with basic hand tools. Replaces GM part numbers: 23467660, 20917396, 15819728, 25881207, 20847795, 23210121, 22870902. Note: 2011 model year trucks must update PCV regulating valve to 2012-2016 specification for correct fitment. Not compatible with aftermarket LML Y-bridges that change the manifold/bridge inlet from the original factory driver side inlet location.