GMC Sierra Performance Air Intake – Wehrli 4in Intake Kit with Air Box (Sparkle Copper) for 2004.5–2005 Duramax LLY, replacing restrictive factory parts for improved airflow and response.

This fabricated aluminum system pairs a 4-inch intake tube with a sealed air box and dry filter, drawing cooler air from the inner fender. Smooth bends aid velocity and add a more pronounced turbo note, while a removable lid speeds inspection and the hydrophobic pre-filter helps keep the MAF and turbo clean. Quality hardware, silicone boot, and stainless T-bolt clamps provide a secure, bolt-on fit—no tuning required. Made in the USA.

Features

• 4-inch aluminum intake pipe
• Air box with removable lid; draws cold air from inner fender
• Dry filter with Outerwears pre-filter cover
• Bolt-on install; silicone boot and stainless T-bolt clamps

Have questions or want to book? Call our Austin, Texas or Los Angeles, California area shops: TX 512-982-9393, CA 562-981-6800. We offer installation and customization services.

Buying multiple items? Contact us for possible shipping discounts.

We install on premises at both locations.

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