GMC Sierra 3500 HD Performance Air Intake - Wehrli WCF 4in Intake Kit - Cat Yellow (2020-2025). High-flow aluminum intake and airbox replacing restrictive factory components on L5P 6.6L Duramax.

Drawing cool air from the functional hood Ram Air duct and inner fender, this 4-inch system improves airflow, helps reduce intake temps, and sharpens throttle response. Smooth, large-radius aluminum tubing and the enclosed 10-gauge air box raise velocity and amplify turbo sound. Cat Yellow powder coat, serviceable dry filter, and true bolt-on fit with no tuning required; works with stock trucks. Note: disable the OE air filter monitor to avoid service messages.

Features

• 4 in. fabricated aluminum intake pipe
• 10-ga aluminum air box and lid
• Seal to functional hood Ram Air port
• Dry filter plus Outerwears pre-filter
• Stainless T-bolt clamps and silicone boot

Questions? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area location at 562-981-6800. We offer professional installation and customization at both locations.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov