{"product_id":"aem-induction-21-478c-cold-air-intake-system-for-2008-2014-subaru-wrx-and-sti","title":"AEM Induction 21-478C Cold Air Intake System for 2008-2014 Subaru WRX and STI","description":"AEM cold air intake systems are designed to increase horsepower and torque. The system includes an oversized AEM DRYFLOW synthetic washable air filter, engineered to provide outstanding airflow, filtration, and performance, and also features a mandrel-bent aluminum intake tube and high quality hardware. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay, and the factory fresh air duct attaches to the heat shield. The entire system can typically be installed in less than 90 minutes.\nAEM's mandrel-bent aluminum cold air intake systems are guaranteed to provide an increase in horsepower and torque, and are protected by the AEM Lifetime Limited Warranty.\nAssociated products: AEM-1-1000 Air Filter Cleaner\n\u003cul\u003e\n  \u003cli\u003eUtilizes washable, reusable, oil-free synthetic filter media that preserves airflow efficiency, traps harmful contaminants, and provides long-term value over disposable filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade the intake performance of your compatible Subaru WRX or STI with the AEM Induction 21-478C Cold Air Intake System. Designed to increase horsepower and torque, this system replaces restrictive factory intake components with a mandrel-bent aluminum intake tube, a custom heat shield, and an oversized AEM DRYFLOW synthetic air filter. The gunmetal gray finish provides a clean, performance-oriented appearance while supporting reliable operation in demanding driving conditions.\u003c\/p\u003e\n\n\u003cp\u003eThe reusable, washable, oil-free synthetic filter is engineered to provide strong airflow while trapping harmful contaminants without filter oil. Under normal highway driving conditions, the oversized conical filter can typically be serviced at intervals of up to 100,000 miles. The custom heat shield helps isolate the filter from high engine-bay temperatures, and the factory fresh-air duct attaches directly to the shield to help maintain a consistent supply of cooler intake air.\u003c\/p\u003e\n\n\u003cp\u003eInstallation can typically be completed in less than 90 minutes using quality included hardware and standard hand tools. The mandrel-bent aluminum construction supports smooth airflow and long-term durability, while the AEM Lifetime Limited Warranty provides additional product assurance. This intake system is intended for the listed Subaru applications and is not CARB approved; verify emissions requirements before installation. AEM-1-1000 Air Filter Cleaner is available separately for maintaining the reusable filter.\u003c\/p\u003e\n\n\u003ch3\u003eKey Product Specifications and Technical Data\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBrand: AEM Induction\u003c\/li\u003e\n  \u003cli\u003ePart Number: 21-478C\u003c\/li\u003e\n  \u003cli\u003eProduct Type: Cold air intake system\u003c\/li\u003e\n  \u003cli\u003eFinish: Gunmetal gray\u003c\/li\u003e\n  \u003cli\u003eFilter Type: Oversized conical DRYFLOW synthetic filter\u003c\/li\u003e\n  \u003cli\u003eFilter Media: Washable, reusable, oil-free synthetic media\u003c\/li\u003e\n  \u003cli\u003eIntake Tube Material: Mandrel-bent aluminum\u003c\/li\u003e\n  \u003cli\u003eWarranty: AEM Lifetime Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMandrel-bent aluminum intake tube\u003c\/li\u003e\n  \u003cli\u003eAEM DRYFLOW synthetic air filter\u003c\/li\u003e\n  \u003cli\u003eCustom heat shield\u003c\/li\u003e\n  \u003cli\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eFits select 2008-2014 Subaru Impreza, WRX, and STI applications. Confirm the exact vehicle configuration and model year before ordering. This product is not CARB approved, and applicable emissions regulations should be reviewed before installation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePerformance Improvement: Designed to increase horsepower and torque by improving intake airflow.\u003c\/li\u003e\n\u003cli\u003eDRYFLOW Filter: Includes a washable, reusable, oil-free synthetic filter that supports airflow efficiency and contaminant control.\u003c\/li\u003e\n\u003cli\u003eExtended Service Interval: The oversized conical filter can typically go up to 100,000 miles between services under normal highway driving conditions.\u003c\/li\u003e\n\u003cli\u003eHeat Protection: Custom heat shield helps protect incoming air from high engine-bay temperatures while connecting to the factory fresh-air duct.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n2008 Subaru Impreza WRX\u003cbr\u003e\n2008 Subaru Impreza WRX STI\u003cbr\u003e\n2009 Subaru Impreza WRX\u003cbr\u003e\n2009 Subaru Impreza WRX Premium\u003cbr\u003e\n2009 Subaru Impreza WRX STI\u003cbr\u003e\n2010 Subaru Impreza WRX\u003cbr\u003e\n2010 Subaru Impreza WRX Limited\u003cbr\u003e\n2010 Subaru Impreza WRX Premium\u003cbr\u003e\n2010 Subaru Impreza WRX STI\u003cbr\u003e\n2010 Subaru Impreza WRX STI Special Edition\u003cbr\u003e\n2011 Subaru Impreza WRX\u003cbr\u003e\n2011 Subaru Impreza WRX Limited\u003cbr\u003e\n2011 Subaru Impreza WRX Premium\u003cbr\u003e\n2011 Subaru Impreza WRX STI\u003cbr\u003e\n2011 Subaru Impreza WRX STI Limited\u003cbr\u003e\n2012 Subaru Impreza WRX\u003cbr\u003e\n2012 Subaru Impreza WRX Limited\u003cbr\u003e\n2012 Subaru Impreza WRX Premium\u003cbr\u003e\n2012 Subaru Impreza WRX STI\u003cbr\u003e\n2012 Subaru Impreza WRX STI Limited\u003cbr\u003e\n2013 Subaru Impreza WRX\u003cbr\u003e\n2013 Subaru Impreza WRX Limited\u003cbr\u003e\n2013 Subaru Impreza WRX Premium\u003cbr\u003e\n2013 Subaru Impreza WRX STI\u003cbr\u003e\n2013 Subaru Impreza WRX STI Limited\u003cbr\u003e\n2014 Subaru Impreza WRX\u003cbr\u003e\n2014 Subaru Impreza WRX Limited\u003cbr\u003e\n2014 Subaru Impreza WRX Premium\u003cbr\u003e\n2014 Subaru Impreza WRX STI\u003cbr\u003e\n2014 Subaru Impreza WRX STI Limited\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: true\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"AEM Induction","offers":[{"title":"Default Title","offer_id":67616347652348,"sku":"21-478C","price":284.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/90a110981a946537f51d72dadc67e74a.jpg?v=1790822723","url":"https:\/\/diycustoms.store\/products\/aem-induction-21-478c-cold-air-intake-system-for-2008-2014-subaru-wrx-and-sti","provider":"diycustoms.store","version":"1.0","type":"link"}