{"product_id":"aem-induction-21-856c-performance-cold-air-intake-for-2017-2019-subaru-legacy-2-5l-h4","title":"AEM Induction 21-856C Performance Cold Air Intake for 2017-2019 Subaru Legacy 2.5L H4","description":"The AEM Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific models. Air enters the system through an oversized 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 which is designed to reduce intake air temperature and increase horsepower. The air intake tube 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 breather tube. The tapered 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 vehicle applications to determine the legal status for each vehicle.\nAEM's Performance Cold Air Intake Systems are designed, tuned and dyno-tested to give your engine more power and acceleration by replacing the restrictive factory air filter, air intake tubing and air box assembly.\nAssociated products: AEM-1-4007 Air Filter Wrap, AEM-21-2027DK AEM DryFlow Air Filter, 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  \u003cli\u003eAEM Lifetime Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe AEM Induction 21-856C Performance Cold Air Intake System is engineered for select 2017-2019 Subaru Legacy models equipped with the 2.5L H4 engine. Replacing the restrictive factory air filter, intake tubing, and airbox assembly, this system is designed to improve airflow, throttle response, horsepower, torque, and acceleration. Each application is specifically designed, tuned, and dyno-tested for reliable performance while retaining compatibility with the vehicle’s factory emissions control components, including the mass airflow sensor and breather tube.\u003c\/p\u003e\u003cp\u003eAir enters through an oversized AEM Dryflow synthetic air filter positioned in the original airbox area. The oil-free, washable, and reusable filter media provides effective contaminant filtration while maintaining airflow efficiency. Depending on driving conditions, the filter can be used for up to 100,000 miles before cleaning is required. A protective heat shield helps reduce exposure to engine-bay heat, while the mandrel-bent aluminum intake tube features a durable gunmetal gray powder-coated finish for long-term service.\u003c\/p\u003e\u003cp\u003eThe AEM Induction 21-856C is designed for straightforward installation using commonly available tools and is backed by AEM’s Lifetime Limited Warranty. Associated service products include the AEM 1-4007 Air Filter Wrap, AEM 21-2027DK DryFlow Air Filter, and AEM 1-1000 Air Filter Cleaner. This intake is not approved for sale or use in California or other states that adopt California emissions standards; verify emissions legality for the specific vehicle application before purchase. California emissions acknowledgement may be required. Proposition 65 warning applies.\u003c\/p\u003e\u003ch3\u003eKey Product Specifications and Technical Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: AEM Induction\u003c\/li\u003e\n\u003cli\u003ePart Number: 21-856C\u003c\/li\u003e\n\u003cli\u003eProduct Type: Performance cold air intake system\u003c\/li\u003e\n\u003cli\u003eApplication: Select 2017-2019 Subaru Legacy models\u003c\/li\u003e\n\u003cli\u003eEngine Compatibility: 2.5L H4 gasoline engine\u003c\/li\u003e\n\u003cli\u003eIntake Tube Material: Mandrel-bent aluminum\u003c\/li\u003e\n\u003cli\u003eFilter Type: Washable, reusable, oil-free synthetic AEM Dryflow filter\u003c\/li\u003e\n\u003cli\u003eWarranty: AEM Lifetime Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAluminum intake tube\u003c\/li\u003e\n\u003cli\u003eAEM Dryflow synthetic air filter\u003c\/li\u003e\n\u003cli\u003eHeat shield\u003c\/li\u003e\n\u003cli\u003eRequired intake system components and installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2017-2019 Subaru Legacy applications equipped with the 2.5L H4 engine. Confirm exact vehicle configuration and emissions requirements before installation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePerformance airflow: Replaces restrictive factory intake components to support improved horsepower, torque, throttle response, and acceleration.\u003c\/li\u003e\n\u003cli\u003eAEM Dryflow filter: Uses washable, reusable, oil-free synthetic media for efficient filtration and long-term airflow performance.\u003c\/li\u003e\n\u003cli\u003eHeat protection: Includes a protective heat shield designed to reduce intake air temperature by limiting exposure to engine-bay heat.\u003c\/li\u003e\n\u003cli\u003eDurable construction: Features a mandrel-bent aluminum intake tube with a gunmetal gray powder-coated finish and includes AEM’s Lifetime Limited Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n2017 Subaru Legacy 2.5i\u003cbr\u003e\n2017 Subaru Legacy 2.5i Limited\u003cbr\u003e\n2017 Subaru Legacy 2.5i Premium\u003cbr\u003e\n2017 Subaru Legacy 2.5i Sport\u003cbr\u003e\n2018 Subaru Legacy 2.5i\u003cbr\u003e\n2018 Subaru Legacy 2.5i Limited\u003cbr\u003e\n2018 Subaru Legacy 2.5i Premium\u003cbr\u003e\n2018 Subaru Legacy 2.5i Sport\u003cbr\u003e\n2019 Subaru Legacy 2.5i\u003cbr\u003e\n2019 Subaru Legacy 2.5i Limited\u003cbr\u003e\n2019 Subaru Legacy 2.5i Premium\u003cbr\u003e\n2019 Subaru Legacy 2.5i Sport\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":67616146686204,"sku":"21-856C","price":375.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/1b855f309303ea50cc33323c4bb1e641.jpg?v=1790818230","url":"https:\/\/diycustoms.store\/products\/aem-induction-21-856c-performance-cold-air-intake-for-2017-2019-subaru-legacy-2-5l-h4","provider":"diycustoms.store","version":"1.0","type":"link"}