Wehrli WCF100775-RED 4in Cast Turbo Intake Horn WCFab Red 2017-2025 L5P Duramax

Vehicle Fitment

• 2017-2025 Chevrolet Silverado 2500HD (6.6L Duramax L5P, 4WD/2WD - All Trims)
• 2017-2025 Chevrolet Silverado 3500HD (6.6L Duramax L5P, 4WD/2WD - All Trims)
• 2017-2025 GMC Sierra 2500HD (6.6L Duramax L5P, 4WD/2WD - All Trims)
• 2017-2025 GMC Sierra 3500HD (6.6L Duramax L5P, 4WD/2WD - All Trims)
• 2019-2024 Chevrolet Silverado 4500HD / 5500HD / 6500HD (6.6L Duramax L5D - All Trims)
• 2019-2024 GMC Sierra 4500HD / 5500HD / 6500HD (6.6L Duramax L5D - All Trims)

Fitment Notes

• Compatible with the factory VGT turbocharger and upgraded drop-in VGT-style turbochargers.
• Compatible with the OEM intake and aftermarket intake systems.
• No tuning required - bolt-on installation compatible with stock trucks.
• This listing is for the WCFab Red / Illusion Cherry (-RED) powder coat color option.
• This product cannot ship to the State of California.

Features

• Flows 27% better than the factory L5P Duramax turbo intake horn for improved turbo efficiency and throttle response.
• True 4" inlet diameter with a smooth flowing internal transition to a strategically designed anti-surge face that properly engages the turbo compressor cover for optimized airflow and spool-up.
• High-flow cast aluminum construction for superior strength and thermal stability over the OEM plastic horn.
• Modified trucks can see up to a 10HP increase; applications with upgraded turbochargers can experience as much as a 20HP increase.
• Includes a new intake-to-turbo gasket and stainless steel hardware for a complete, leak-free installation.
• Finished in WCFab Red (Illusion Cherry) powder coat for a bold, standout underhood appearance.
• Made in the USA by Wehrli Custom Fabrication.

Specifications

• Part Number: WCF100775-RED
• Color/Finish: WCFab Red / Illusion Cherry Powder Coat
• Inlet Diameter: 4"
• Airflow Improvement: 27% over stock
• Material: High-flow cast aluminum
• Hardware: New intake gasket and stainless steel hardware included
• Package Weight: 5.0 lbs
• Package Dimensions: 12.0" W x 6.0" H x 12.0" L
• Country of Origin: USA

Included Components

• 1x 4" high-flow cast aluminum turbo intake horn (WCFab Red powder coated)
• 1x New intake-to-turbo gasket
• Stainless steel installation hardware

Product Description

The Wehrli WCF100775-RED is a 4" High Flow Cast Turbo Intake Horn for 2017-2025 L5P Duramax and 2019-2024 L5D medium-duty trucks. It replaces the factory plastic turbo intake horn with a precision cast aluminum unit that flows 27% better than stock, delivering improved turbo spool-up, throttle response, and horsepower gains across a wide range of applications. The true 4" inlet features a smooth internal transition to an anti-surge face designed to properly engage the L5P turbo compressor cover for optimized airflow dynamics.

On modified trucks, gains of up to 10HP are common; trucks running upgraded drop-in VGT turbochargers can see as much as 20HP. The kit includes a new intake gasket and stainless steel hardware for a complete bolt-on installation requiring no tuning. Compatible with stock and aftermarket intake systems. Finished in WCFab Red (Illusion Cherry) powder coat and made in the USA by Wehrli Custom Fabrication.