Wehrli WCF100344-GB 4in Intake Kit for 2017-2019 Chevy Silverado/GMC Sierra 6.6L

Vehicle Fitment

• 2017-2019 Chevrolet Silverado 2500 HD (6.6L Duramax L5P Diesel, RWD/4WD)
• 2017-2019 Chevrolet Silverado 3500 HD (6.6L Duramax L5P Diesel, RWD/4WD)
• 2017-2019 GMC Sierra 2500 HD (6.6L Duramax L5P Diesel, RWD/4WD)
• 2017-2019 GMC Sierra 3500 HD (6.6L Duramax L5P Diesel, RWD/4WD)

Features

• Large-diameter 4-inch aluminum intake pipe designed for improved airflow
• Fabricated aluminum air box enclosure with removable lid
• High-flow dry air filter designed for diesel performance applications
• Outerwear's hydrophobic pre-filter cover helps block water and debris
• Draws cooler air from the hood ram-air duct and inner fender area
• Gloss black powder-coat finish for durability and engine bay aesthetics
• Improves turbocharger airflow for better throttle response
• Bolt-on installation requiring no tuning

Specifications

• Part Number: WCF100344-GB
• Product Type: Performance Cold Air Intake System
• Pipe Diameter: 4 inches
• Pipe Material: Aluminum
• Air Box Construction: Fabricated aluminum enclosure
• Filter Type: Dry performance air filter
• Finish: Gloss black powder coat
• Installation: Direct bolt-on with supplied hardware
• Fuel Compatibility: Diesel engines

Included Components

• 1x 4-inch aluminum intake pipe
• 1x Fabricated aluminum air box with removable lid
• 1x High-flow dry air filter
• 1x Outerwear's hydrophobic pre-filter cover
• 1x Silicone intake coupler
• Multiple stainless steel T-bolt clamps
• 1x Hood ram-air seal
• 1x Complete installation hardware kit

Product Description

The Wehrli WCF100344-GB 4-inch Intake Kit is a high-flow performance intake system designed for 2017-2019 Chevrolet Silverado and GMC Sierra HD trucks equipped with the 6.6L Duramax L5P diesel engine. This kit replaces the restrictive factory intake system with a large-diameter aluminum intake pipe and a sealed fabricated aluminum air box. The increased airflow capacity helps the turbocharger breathe more efficiently, improving throttle response and supporting higher performance potential in both stock and modified trucks.

A high-flow dry air filter paired with an Outerwear's hydrophobic pre-filter cover helps protect the engine by preventing water, dirt, and debris from entering the intake system. The intake draws cooler air from the factory hood ram-air duct and inner fender area to maintain stable intake temperatures under load. Finished in a durable gloss black powder coat, the system enhances engine bay appearance while resisting corrosion. The kit installs using factory mounting points with basic hand tools and does not require tuning, making it a straightforward performance upgrade for Duramax L5P trucks.