Chevrolet Silverado Performance Air Intake - Wehrli - High Flow Cast Aluminum - Gloss White - `01-`04. A direct-fit, cast-aluminum turbo inlet horn designed for 2001–2004 Silverado trucks with the LB7 6.6L Duramax to improve turbo airflow and throttle response.

This Wehrli high-flow intake horn replaces the restrictive OEM turbo mouthpiece with a true 4" inlet and a smooth transition to the turbo compressor cover. Machined cast aluminum construction and a durable gloss-white powder coat provide strength and corrosion resistance while the O-ring seal at the turbo face ensures a secure connection. It’s a bolt-on upgrade that works with factory IHI turbos and many aftermarket drop-in compressors; no tuning required for stock applications. Note compatibility requirements below before ordering.

Features

• Precision CNC machined cast aluminum construction
• True 4" inlet that flows up to 40% better than stock
• Gloss white custom powder coat finish (Made in USA)
• O-ring seal at turbo face and included mounting hardware
• Compatible with factory IHI and many aftermarket drop-in turbos

Fitment note: Designed to work with aftermarket intake systems that use a 4" boot connection with bead roll (for example our 4" intake kits). NOT compatible with OEM intake assemblies or intakes where the rubber/silicone connection is molded into the intake pipe and not removable. Performance gains depend on vehicle setup; upgraded turbo applications or tuned trucks may see the largest benefits.

Questions? Call us directly for fitment help, pricing, or to schedule installation and customization at either of our shops in Austin, TX or the Los Angeles, CA area: 512-982-9393 (TX) or 562-981-6800 (CA). We install on premises 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