Wehrli Custom Fabrication WCF100775-BS High Flow Cast Turbo Intake Horn Blue Steel

The Wehrli Custom Fabrication WCF100775 is a high-flow cast aluminum turbo intake horn engineered to deliver a significant airflow improvement over the restrictive factory plastic inlet. Finished in Wehrli's distinctive Blue Steel powder coat, this bolt-on upgrade replaces the OEM intake horn with a precision-crafted piece designed to optimize turbo feed on 6.6L Duramax L5P diesel engines.

Key Features:

• 27% greater airflow compared to stock intake horn
• 25% greater flow area than OEM at the compressor inlet
• True 4" inlet with a smooth-flowing transition to a strategically designed anti-surge face that properly engages the turbo compressor cover for optimized airflow and drivability
• CNC machined cast aluminum construction for strength and precision fit
• Compatible with the factory VGT turbocharger as well as OEM-style aftermarket drop-in VGT turbos
• Compatible with OEM and aftermarket air intake systems
• No tuning required — true bolt-on installation
• Includes new gasket and stainless steel hardware
• Includes PCV/valve cover breather port
• Custom Blue Steel powder coat finish
• Made in the USA
• 1-year manufacturer warranty

Upgrading to the WCFab high-flow intake horn delivers quicker turbo spool-up, increased horsepower potential, and improved throttle response — all without requiring any ECM tuning or additional vehicle modifications.