Chevrolet Duramax Performance Air Intake - Wehrli - 3in Y-Bridge Kit - Cat Yellow - '06-'07. A high-flow, bolt-together upgrade for 2006–2007 LBZ trucks that replaces the failure-prone factory Y-bridge.

This WCFab system creates a full 3-inch tract from intercooler to engine, addressing OEM slip-fit leaks and restrictions. Smooth mandrel bends and CNC-machined billet flanges improve airflow and sealing, while retaining the factory grid heater and EGR connections. Compatible with stock trucks—no tuning or extra parts required—and finished in Cat Yellow powder coat. Works with the OEM lower passenger-side intercooler pipe or WCFab’s 3.5-inch upgrade (WCF100367). Includes silicone boots, stainless T-bolt clamps, MAP seal, O-rings, EGR gasket, and grid heater hardware. Made in the USA.

Features

• WCFab signature 3-inch two-piece bolt-together Y-bridge
• Up to 36% airflow improvement over stock
• 3-inch upper and lower intercooler pipes
• Smooth mandrel bends, CNC billet flanges
• Retains grid heater and EGR connections
• Direct-fit for 2006–2007 Duramax LBZ; no tuning required

Questions or planning a build? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations.

If you’re purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov