Chevrolet 4500 Performance Air Intake - Wehrli - High Flow Intake Horn - Cat Yellow - 2019–2024. This CNC-machined cast-aluminum turbo inlet replaces the restrictive factory mouthpiece on L5D 6.6L Duramax medium-duty trucks for cleaner airflow and quicker throttle response.

Featuring a true 4 inch inlet and a carefully profiled anti-surge face that keys into the compressor cover, this horn is designed for optimized airflow and drivability with stock or drop-in turbos. An O-ring face seal, #10 ORB billet PCV barb, and included hardware make it a straightforward bolt-on with no tuning required. The durable Cat Yellow powder coat and all-aluminum construction handle heat and hard use, and it works with OEM or aftermarket cold air intake systems.

Features

• 25% greater flow area at compressor inlet; up to 27% better than stock
• CNC-machined cast aluminum construction; Made in USA
• True 4 in. inlet with anti-surge face and O-ring seal to turbo
• #10 ORB billet PCV connection; mounting hardware included
• Fits 2019–2024 Chevy/GMC 4500–6500 L5D 6.6L; bolt-on, no tuning
• Replaces GM turbo inlet PN 12678756; also 19432816, 12682569

Have questions or want this installed? Call our team—we can help you spec the right setup and schedule service. We offer installation and customization at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX) and 562-981-6800 (CA).

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