{"product_id":"blox-racing-15-21-wrx-sti-street-series-ii-plus-coilovers","title":"BLOX Racing 15-21 WRX\/STI Street Series II Plus Coilovers","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eBXSS-03505\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eBLOX Racing 15-21 WRX\/STI Street Series II Plus Coilovers\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe BLOX Racing Street Series II Plus Coilover system delivers 32-way damping adjustment for precise suspension tuning on 2015-2021 Subaru WRX and STI models. This twin-tube design with threaded spring perches allows ride height changes while balancing stiffness for street driving and track performance. Pre-assembled kits include weighted springs, top mounts, dust covers, bump stops, and spanner wrenches for direct bolt-on installation and reliable handling.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e32-Way Damping Adjustment:\u003c\/strong\u003e Twin-tube shocks filled with high-viscosity oil maintain consistency across various conditions for improved cornering and stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded Spring Perches:\u003c\/strong\u003e Enable easy ride height adjustments from 1-3 inches drop to match your setup without sacrificing alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE 9254 Springs:\u003c\/strong\u003e CNC-wound with 8kg\/mm front and 7kg\/mm rear rates, heat-treated and powder-coated for fatigue resistance and corrosion protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Top Mounts:\u003c\/strong\u003e High-quality pillowball mounts reduce deflection and provide sharper steering response on VA-chassis WRX\/STI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDyno and Cycle Tested:\u003c\/strong\u003e Proven reliability under extreme loads ensures longevity for daily drives and endurance events.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePre-assembled for straightforward setup with all necessary hardware included.\u003c\/li\u003e\n\u003cli\u003eRegular damping adjustments recommended based on tire pressures and track conditions.\u003c\/li\u003e\n\u003cli\u003eShips in heavy-duty box measuring 28 x 16 x 16 inches with 58 lbs product weight.\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\u003eRequires strut disassembly. reuse OEM sway bar links if compatible.\u003c\/li\u003e\n\u003cli\u003eCompatible with factory upper mounts on 2015-2021 WRX\/STI. camber kits advised for lowered setups.\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\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX\u003c\/td\u003e\n\u003ctd\u003eBase, Premium, Limited, Sport, GT\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\u003eSTI\u003c\/td\u003e\n\u003ctd\u003eBase, Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose BLOX Racing?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEstablished leader in motorsport components trusted by racers worldwide.\u003c\/li\u003e\n\u003cli\u003eSprings and shocks built with racing-grade materials for repeated high-stress use.\u003c\/li\u003e\n\u003cli\u003eEngineered specifically for Subaru VA chassis with extensive dyno validation.\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 2018 Subaru WRX Premium?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, BXSS-03505 fits all 2015-2021 WRX models including Premium, with direct bolt-on installation using included top mounts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What spring rates are used?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Front springs rate at 8kg\/mm and rear at 7kg\/mm using SAE 9254 steel for balanced street and track performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty covers this coilover kit?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e BLOX Racing offers a 1-year limited warranty against manufacturing defects with proper installation and maintenance.\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 Securely boxed coilover kit, 28 x 16 x 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 58 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BLOX Racing","offers":[{"title":"Default Title","offer_id":41006379761743,"sku":"BLOBXSS-03505","price":1039.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/blox-racing-15-21-wrxsti-street-series-ii-plus-coilovers-blox-racing.jpg?v=1768509768","url":"https:\/\/www.blackopsautoworks.com\/products\/blox-racing-15-21-wrx-sti-street-series-ii-plus-coilovers","provider":"Black Ops Auto Works","version":"1.0","type":"link"}