GMC Medium Duty 4500 Performance Air Intake by Wehrli Custom Fabrication - High Flow Intake Horn, Flat Black (2019-2024). This cast-aluminum turbo intake horn replaces the restrictive factory piece to increase airflow and sharpen throttle response on L5D 6.6L Duramax trucks.

The true 4 in. inlet and anti-surge face locate into the compressor cover to optimize airflow and drivability. CNC-machined cast aluminum with an O-ring seal and a #10 ORB billet PCV port delivers a precise, durable fit. Direct bolt-on, no tuning required; compatible with stock or OEM-style aftermarket cold air intakes. Flat black powder coat. Made in the USA.

Features

• 4 in. inlet; 25% greater area at compressor inlet; 27% better flow than stock
• Anti-surge face engages turbo compressor cover
• Replaces OEM plastic mouthpiece; bolt-on with O-ring seal; includes hardware
• Works with stock and drop-in upgraded turbos; billet PCV connection

Have questions or want to schedule install or customization at our Austin, TX or Los Angeles, CA area shops? Call 512-982-9393 or 562-981-6800.

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