GMC Duramax Performance Air Intake - Wehrli - 4in with Air Box - Illusion Purple - 01-04 is a high-flow aluminum intake for 2001-2004 GM 6.6L Duramax LB7 trucks. It replaces restrictive factory parts to deliver cleaner airflow and sharper throttle response.

Built by Wehrli Custom Fabrication, this intake pairs a fabricated 4-inch aluminum pipe with an enclosed air box and dry filter to draw cooler air from the inner fender. Smooth, large-radius bends help improve air velocity and volume, while the design adds a more pronounced turbo and engine note under load. Quality hardware, silicone boot, seals, and stainless T-bolt clamps promote durability and easy installation. A removable lid simplifies filter inspection, and the included hydrophobic pre-filter cover helps keep contaminants at bay. Finished in striking Illusion Purple powder coat. No tuning required; bolt-on. Made in the USA.

Features

• 4-inch fabricated aluminum intake tube with smooth bends
• Enclosed air box with dry filter; draws cold air through inner fender
• Silicone boot, seals, and stainless T-bolt clamps
• Removable lid and hydrophobic pre-filter cover
• No tuning required; bolt-on install with basic tools
• Illusion Purple powder coat; fits 2001-2004 Duramax LB7

Questions or planning an install? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations.

Buying multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

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