GMC Sierra HD Performance Air Intake – Wehrli 5 in WCF Intake Horn, Deore Gold (2011–2016). A high-flow cast aluminum horn that replaces the restrictive factory inlet to feed your LML turbo with cleaner, quicker airflow.

Built in the USA, this cast piece (marketed as 5 in, 4.8 in inlet at the turbo) deletes the resonator for a more pronounced turbo note and improved throttle response. It includes a PCV port and pairs with WCFab Stage 1 LML intake kits and High Flow bundles. The Deore Gold powder coat resists heat and corrosion. Fits 2011–2016 GMC Sierra HD with Duramax LML; replaces GM 12642296 and 12637801. Note: 2011 trucks must update the PCV regulating valve to 2012–2016 spec.

Features

• Cast aluminum construction
• 4.8 in inlet (largest WCFab LML horn)
• PCV connection port
• Resonator connection eliminated
• O-ring seal and new EGR gaskets
• Stainless steel T-bolt clamps
• Silicone reducer boot
• Requires intake pipe for a 4 in silicone boot and clamp; not compatible with molded-end intakes or Y-bridges that relocate the inlet

Have questions or want to confirm fitment? Call us at 512-982-9393 (Austin, TX) or 562-981-6800 (Los Angeles, CA area). We offer installation and customization at both locations. Considering 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