AEM 21-9021DC Brute Force HD Intake System for 01-04 GM 6.6L LB7 Duramax Pickup

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AEM 21-9021DC Brute Force HD Intake System for 01-04 GM 6.6L LB7 Duramax Pickup


Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit

The AEM 21-9021DC Brute Force HD Diesel Air Intake System produces horsepower and torque gains for diesel engines by replacing the vehicle’s restrictive factory air filter and air intake housing. This air intake system was designed, tuned, and dyno-tested to fit specific GMC Sierra 2500 HD, 3500, and Chevrolet Silverado 2500 HD, 3500 models. Air enters the system through an extra-large AEM Dryflow synthetic washable air filter for outstanding air flow, filtration, and performance. The air filter is located in the original air box space and is protected by a heat shield that is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder-coated finish.

This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass airflow sensor and air filter restriction gauge. The oval cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is easy to install with commonly available tools and it is backed by AEM's Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards, while others are 50 state legal. View the 21-9021DC vehicle applications to determine the legal status of each vehicle.

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