Fits: 2001 thru 2004 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7 Duramax Diesel Replace the restrictive plastic factory air intake box for improved engine performance with the Wehrli Custom Fabrication 4" Air Intake Kit. This new design significantly increases air flow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the inner fender. Features: 4" diameter piping, 14ga. Aluminum 10ga. Aluminum construction air box Removable air box lid for ease of maintenance Improve airflow, throttle response, horsepower & torque Cooler intake air temperatures Aggressive engine and turbo sounds during acceleration High quality hardware, silicone boots, & stainless t-bolt clamps Installs easily with basic hand tools Made in the USA Includes: 4" Intake pipe Air box with lid Dry style air filter Outerwears pre-filter cover Hardware Silicone boot & Stainless steel T-bolt clamps O-Ring seal Custom color powder coat POWDERCOAT COLOR CHART Notes: 15+ Business Days Before Shipment, this is a custom order part, once the order has been processed it CANNOT be canceled, returned, or refunded If you enter a powdercoat color that is not listed on the chart, your order will be delayed as we will have to contact you to discuss the options. RAW Finish is NOT available! Replaces Part #: GM 19201277 GM 25345138 GM 21993711 GM 15076901 *THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.*
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