Chevrolet Medium Duty 4500 Performance Air Intake by Wehrli — High Flow Intake Horn, Flat Black (2019–2024). This CNC‑machined cast aluminum turbo inlet replaces the restrictive OEM mouthpiece to improve airflow and throttle response on L5D 6.6L Duramax‑equipped 4500 trucks.

A true 4 in. inlet and smooth transition feed a strategically shaped anti‑surge face that seats in the compressor cover for optimized airflow and drivability. It's a direct bolt‑on with no tuning, compatible with stock and OEM‑style drop‑in turbos, and pairs with OEM or aftermarket cold air intakes. Includes a #10 ORB billet PCV port, O‑ring turbo seal, flat black powder coat, and mounting hardware. Made in the USA.

Features

• True 4 in. turbo inlet; 25% greater flow area at compressor inlet vs OEM
• CNC machined cast aluminum construction
• Anti‑surge face engages compressor cover
• Bolt‑on install; no tuning required
• Works with OEM and aftermarket cold air intake systems
• Fitment: 2019–2024 GM Medium Duty 4500 with L5D 6.6L Duramax

Have questions or want to plan your build? Call our Austin, Texas shop at 512-982-9393 or our Los Angeles, California area location at 562-981-6800. We offer installation and customization services at both locations. If you're 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