4" Intake Kit with Air Box

Replace the later L5P plastic intake with a 4-inch fabricated aluminum system and air box. It draws from the hood ram-air duct and inner fender, with a dry filter assembly for the intake air supply.

Features & included components

• 4-inch aluminum piping
• Air-box enclosure and dry filter
• Powder-coated finish choices
• Basic hand-tool installation
• No tuning required on the stated stock setup

Fitment & installation notes

2020–2026 Chevrolet Silverado/GMC Sierra 2500/3500 HD 6.6L L5P Duramax. Disable air-filter monitor per manufacturer instructions; leaving it active may trigger a service message requiring dealership reset. Specify the vehicle model year when ordering.

Disable the air-filter monitor using the manufacturer’s procedure. Leaving it active can trigger a service-air-filter message requiring a dealership reset; the correct setting shows filter life disabled.

Shipping restriction: Not available for shipment to California.

Manufacturer part number: WCF100702

Fitment: 2020–2026 Chevrolet Silverado/GMC Sierra 2500/3500 HD 6.6L L5P Duramax. Disable air-filter monitor per manufacturer instructions; leaving it active may trigger a service message requiring dealership reset. Specify the vehicle model year when ordering.