Wehrli Custom Fabrication WCF100535-SGS 4 Inch Turbo Intake Horn for 2001-2004 Duramax LB7

The Wehrli Custom Fabrication WCF100535 4-inch Turbo Intake Horn replaces the restrictive OEM turbocharger mouthpiece on your 2001-2004 GM 6.6L Duramax LB7, delivering improved airflow and performance gains for your diesel truck.

Performance Benefits:

• Flows 40% better than stock for maximum airflow to the turbocharger
• Offers quicker spool up and more horsepower - max-effort tuned trucks can see 10-15 HP gains while applications with upgraded turbochargers can experience as much as 20 HP improvements
• Designed to provide increased airflow to your turbocharger for improved engine performance and throttle response
• True 4-inch inlet turbo intake with smooth flowing transition to turbo compressor cover for optimized airflow and drivability

Construction and Features:

• Precision CNC machined cast aluminum construction for superior durability
• Compatible with stock and OE-style aftermarket drop-in turbochargers with larger compressor wheels
• Custom powder coat finish for enhanced appearance and corrosion resistance
• Made in USA with premium materials and craftsmanship

Important Compatibility Notes:

• Compatible with factory IHI Turbo or upgraded drop-in IHI Turbos
• Not compatible with OEM intake - works with performance aftermarket intake systems utilizing a 4-inch boot connection with bead roll, like the WCFab 4-inch Intake Kits

This high-flow intake horn is an excellent upgrade for LB7 Duramax owners looking to maximize turbocharger efficiency and unlock additional horsepower. Pairs perfectly with aftermarket cold air intake systems and performance tuning for maximum results.