Wehrli Custom Fabrication WCF100411-CAT Stage 1 High Flow Intake Bundle Kit LB7 Duramax Cat Yellow

The Wehrli Custom Fabrication Stage 1 High Flow Intake Bundle Kit is designed to eliminate restrictive factory components on 2001-2004 LB7 Duramax engines, delivering improved airflow, enhanced throttle response, and faster turbo spool-up. This comprehensive kit replaces the OEM Y-bridge and both intercooler pipes with high-flow 3-inch mandrel bent aluminum piping, creating a complete upgrade path for diesel enthusiasts looking to maximize engine efficiency without replacing their existing air intake or turbo downpipe.

Key Features:

• 3-inch fabricated Y-bridge designed for OEM style intake horn compatibility
• 3-inch passenger side (cold) intercooler pipe
• 3-inch driver side (hot) side intercooler pipe
• Constructed from 14-gauge aluminum with precision TIG welding
• Includes FPRV (Fuel Pressure Relief Valve) block off kit
• O-ring bridge flange gaskets for reliable sealing
• MAP sensor seal and hold down bracket included
• Complete with silicone boots and T-bolt clamps for secure connections
• Finished in durable Cat Yellow powder coat
• 100% made in the USA with CNC machined components

This Stage 1 kit addresses the weak points in the factory intake system between the turbo and engine, providing a significant performance upgrade while maintaining compatibility with stock air intakes and turbo components. The mandrel bent aluminum construction ensures smooth, unrestricted airflow throughout the system, while the custom powder coat finish adds a distinctive look under the hood. Installation hardware and all necessary gaskets are included for a complete bolt-on installation.