{"product_id":"hks-rs-vab-vaf-wrx-sti-ej257","title":"HKS RS VAB VAF WRX STI EJ257","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e70020-AF108\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 4957266275559\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eHKS RS VAB VAF Air Intake System Subaru WRX STI EJ257 2008-2021\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe HKS RS VAB VAF delivers a complete cold air intake upgrade for Subaru WRX STI models equipped with the EJ257 engine from 2008 to 2021. This system replaces the restrictive factory airbox with a high-flow dry filter and aerodynamic ducting to pull in cooler, denser air for noticeable gains in horsepower and acceleration. Drivers experience sharper throttle response and aggressive intake growl during hard shifts.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry Multi-Layer Filter:\u003c\/strong\u003e Progressive density design traps 99% of 5 micron particles while flowing 40% more air than stock for unrestricted engine breathing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFRP Resin Airbox:\u003c\/strong\u003e Lightweight fiber-reinforced plastic construction resists deformation under boost and heat for long-term durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Heat Shield:\u003c\/strong\u003e Aluminum shield blocks engine bay heat to lower intake temperatures by up to 20 degrees F for denser air charge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Filter Angle:\u003c\/strong\u003e Slanted mounting position accelerates airflow velocity into the turbo inlet for improved spool and mid-range torque.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Bolt-On Design:\u003c\/strong\u003e Matches OEM mounting points with included adapters for seamless integration on STI EJ257 setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDirect OEM replacement, no ECU modifications needed for daily driving.\u003c\/li\u003e\n\u003cli\u003eClean filter every 10,000 miles or sooner in dusty conditions for peak performance.\u003c\/li\u003e\n\u003cli\u003ePackaged in sturdy HKS box to prevent damage during transit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eRemove stock airbox and MAF sensor housing in 30-45 minutes.\u003c\/li\u003e\n\u003cli\u003eAll clips, brackets, and silicone couplers provided for direct fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2014\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eImpreza WRX STI\u003c\/td\u003e\n\u003ctd\u003eAll (EJ257)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX STI\u003c\/td\u003e\n\u003ctd\u003eAll (EJ257)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose HKS?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMotorsport-proven designs from Super GT and rally programs.\u003c\/li\u003e\n\u003cli\u003eJDM manufacturing standards ensure exact tolerances and reliability.\u003c\/li\u003e\n\u003cli\u003eDyno-tested power gains of 5-10 whp on stock STI EJ257 tunes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will this fit my 2008 STI?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, compatible with all 2008.5-2021 USDM WRX STI models powered by EJ257 engine, sedan body styles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the filter material and cleaning method?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Synthetic dry media, no oil required. Wash with mild soap, air dry, and reinstall for reuse up to 50,000 miles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does installation require custom tuning?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e No tuning needed for stock or lightly modified EJ257 engines, bolt-on and drive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or FedEx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Original HKS box measures 15.75 x 11.42 x 8.66 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.41 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":40271696003151,"sku":"HKS70020-AF108","price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/hks-rs-vab-vaf-wrx-sti-ej257-hks.png?v=1768435395","url":"https:\/\/www.blackopsautoworks.com\/products\/hks-rs-vab-vaf-wrx-sti-ej257","provider":"Black Ops Auto Works","version":"1.0","type":"link"}