Chevrolet Silverado 3500 HD Performance Air Intake by Wehrli - High Flow Intake Horn, Cat Yellow (2017-2025). This true 4 inch cast aluminum turbo inlet replaces the restrictive factory mouthpiece to boost airflow and sharpen throttle response.

Engineered for the 6.6L Duramax L5P, the Wehrli intake horn provides a smooth transition into the compressor with an anti surge face that engages the cover for consistent drivability. CNC machined cast construction, an O ring turbo face seal, and a billet PCV connection enhance durability and airflow, while the Cat Yellow powder coat adds a bold underhood finish. It is a straightforward bolt on that works on stock trucks, pairs with OEM or aftermarket cold air intakes, and requires no tuning.

Features

• True 4 inch inlet with optimized transition and anti surge face
• CNC machined cast aluminum with O ring turbo face seal
• 25% greater flow area than OEM; flows up to 27% better than stock
• Bolt on installation; no tuning required
• Works with OEM and aftermarket cold air intake systems
• #10 ORB billet PCV port and mounting hardware included
• Custom Cat Yellow powder coat; Made in USA

Have questions or planning a build? Call our Austin, Texas team at 512-982-9393 or our Los Angeles, California area shop at 562-981-6800. We offer installation and customization at both locations and are ready to help you choose complementary parts.

If you are considering multiple items, please contact us to discuss shipping discounts.

We install on premises at both locations.

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