GMC Sierra 3500HD Performance Air Intake - Wehrli Y-Bridge Kit, 3 in., High Flow, Bronze Chrome for 2006-2007 Duramax LBZ. This upgraded two-piece, bolt-together Y-bridge replaces the restrictive OEM upper intake to improve airflow and durability under boost.

Engineered by WCFab, the 3 in. Y-bridge and matched intercooler piping create a consistent high-flow tract from intercooler to intake runners. Smooth mandrel bends and CNC-machined billet flanges promote efficient charge-air delivery, while retaining factory grid heater and EGR connections. Compatible with the OEM lower passenger-side intercooler pipe or WCFab’s 3.5 in. upgrade (WCF100367). No tuning required; installs on stock trucks. Bronze Chrome powder coat provides a clean, durable finish.

Features

• WCFab 3 in. two-piece Y-bridge; 36% airflow gain over stock
• Bolt-together design with secure air horn interface
• 3 in. mandrel-bent upper and lower intercooler pipes
• CNC-machined billet flanges; stainless T-bolt clamps
• Retains factory grid heater and EGR connections
• Includes silicone boot, MAP seal, O-rings, gaskets; Made in USA

Questions or fitment help? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area offering professional installation and customization services.

Ordering multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

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