About AEM Air Intakes for Chevy : For years AEM has been at the forefront of the Chevy aftermarket scene, making quality air intake systems for Chevy vehicles. AEM Chevy air intake systems offer increases in both horsepower and torque, as well as offer improvements in engine efficiency and fuel economy. Each AEM Chevy air intake system is designed vehicle specific, meaning it will bolt right into your Chevy , requiring no additional modifications or parts. You can install an AEM air intake system onto a Chevy that has never been modified without needing to do anything else. AEM Chevy Air Intake Systems also will NOT void your Chevy warranty when installed correctly. AEM makes air intake systems for cars, trucks and suvs. AEM air intake systems feature AEM DryFlow air filters that are maintenance free, requiring no oil! The AEM DryFlow air filter also is 99.52% efficient, exceeding the filtration rate of most of the competition and keeping your engine cleaner. Now that you know the facts about our AEM air intake systems, isn't it time to bring your Chevy up to its potential? If you're not using an AEM intake, your Chevy may be moving, but it could be moving faster. The part number for this item is 21-9032DS and it fits 2011-2012 Chevy Silverado and GMC Sierra 2500 3500 (Duramax 6.6) models.