Fits: 2001 thru 2004 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7 Duramax Diesel

*NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER THE FEDERAL CLEAN AIR ACT (42 U.S.C. § 7522(A)(3))*

*This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.

The Evolution of cold air intakes, produced by Injen Technology, marked the next generation of performance intake systems. Tailored specifically for GM Diesel trucks equipped with the Duramax engine, the Evolution cold air intakes are meticulously crafted in the USA from cross-linked high-density polyethylene, ensuring unparalleled durability. Featuring stainless steel hardware and automotive-grade urethane couplers, this intake system promises an easy installation process without the need for aftermarket tuning, delivering exceptional horsepower and torque gains.

Engineered with precision and tested extensively on Injen's in-house dyno to replicate stock fueling while enhancing performance, the Evolution intakes boast a 2-piece box design incorporating a boost plenum, a massive 360-degree SuperNano-Web dry air filter, and a smooth Rotomolded induction tube for reduced restriction levels. Each Injen Evolution air induction system employs the company's proprietary SuperNano-Web dry air filters, known for their large size and super-deep pleats, some measuring over 1.25 inches deep. Additionally, the SHUR-LOCK mounting system ensures a non-slip seal for the air filter.

The Evolution cold air intake system maximizes available space under the hood to optimize breathing room and deliver extreme performance. With features like the Roto-molded Housing and Boost Plenum for hassle-free installation, a custom-designed Roto-molded Intake Tube for significant power gains, and quality hardware including Stainless Steel Band Clamps and reinforced silicone couplers, this system is engineered for perfect fitment and secure performance.

Thanks to Injen's dedication to testing and refinement, the Evolution Air Intake system has been dyno-proven to provide impressive power gains. With its clean design and superior performance, the Evolution intake system sets a new standard for cold air intakes.

Features:

• Maximum Performance 21 hp / 43 lb-ft. of torque
• Designed to work with the stock calibration
• Aggressive intake growl under acceleration
• Durable Roto-Molded Polyethylene housing and intake tube
• Reinforced automotive grade silicone couplers
• Fully serviceable Injen SuperNano-Web dry air filter
• Replacement air filter part number X-1101-BB
• Optional hydroshield part number 1074BLK
• Stainless steel band clamps with inner protective liner
• Aggressive under hood appearance while maintaining an OE fit
• Made in Pomona California, USA
• Injen Technology Limited Lifetime Warranty

Includes: 

• Evolution Cold Air Intake 

Notes: 

• This product does not currently have CARB exemption status and cannot be purchased in California or used on any vehicle registered with the California Department of Motor Vehicles.

Install Instructions