{"product_id":"eibach-ers-linear-main-spring","title":"Eibach ERS Linear Main Spring","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e1600.300.0350S\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 803050288066\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eEibach ERS Linear Main Spring - Silver Coilover Spring 3.00\" I.D. x 3.50\" Height, 425 lb\/in\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEibach ERS linear main spring delivers consistent 425 lb\/in rate for precise suspension response in racing coilover setups. This 3.00\" ID silver spring with 3.50\" free height suits custom coilovers on performance vehicles from Honda Civic and Subaru WRX to BMW 3-Series and Nissan 240SX. Track-proven construction ensures reliable cornering and stability under high loads.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinear Spring Rate:\u003c\/strong\u003e 425 lb\/in provides predictable damping and handling for autocross, drifting, and circuit racing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.00\" Inner Diameter:\u003c\/strong\u003e Direct fit for most aftermarket coilover struts and sleeves, simplifying builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.50\" Free Height:\u003c\/strong\u003e Allows low ride heights while maintaining travel and preventing bottoming out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilver Epoxy Powder Coat:\u003c\/strong\u003e Resists corrosion and chipping during harsh track conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome-Silicon Steel:\u003c\/strong\u003e Shot-peened, heat-treated, and stress-relieved for fatigue resistance and long service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal for replacement in BC Racing, Tein, or Fortlu coilover systems requiring 3\" ID mains.\u003c\/li\u003e\n\u003cli\u003eInspect perch and top mount compatibility before installation.\u003c\/li\u003e\n\u003cli\u003ePacked in protective sleeve; store in dry area to preserve coating.\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\u003eTorque per manufacturer specs; use spring compressor rated for 3\" ID.\u003c\/li\u003e\n\u003cli\u003eMatches standard Eibach helper springs and aluminum perches.\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\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCivic\u003c\/td\u003e\n\u003ctd\u003eSi \/ Type R Coilover Builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eSubaru\u003c\/td\u003e\n\u003ctd\u003eWRX \/ STI\u003c\/td\u003e\n\u003ctd\u003eCoilover Applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003e240SX \/ Silvia\u003c\/td\u003e\n\u003ctd\u003eDrift \/ Race Setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMiata MX-5\u003c\/td\u003e\n\u003ctd\u003eND \/ NC \/ NB Track Use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3-Series\u003c\/td\u003e\n\u003ctd\u003eE36 \/ E46 Custom Coilovers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Eibach?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMotorsport-proven in Formula Drift and rally championships.\u003c\/li\u003e\n\u003cli\u003ePrecision-wound for exact rate consistency coil-to-coil.\u003c\/li\u003e\n\u003cli\u003eGerman-engineered with tolerances under 1% for repeatable performance.\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 What vehicles does this spring fit?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Fits universal 3.00\" ID coilover systems on performance cars like Honda Civic Si (2006-2015), Subaru WRX (2002-2021), Nissan 240SX (1989-1998), Mazda Miata (1989-2015), and BMW E36\/E46.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material and finish does it have?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e High-tensile chrome-silicon steel construction, shot-peened for strength, with durable silver epoxy powder coat finish.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and installation info?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Eibach offers limited lifetime warranty on manufacturing defects; professional alignment required post-install.\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 USPS Priority\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 Protective plastic sleeve in 5.25\" x 5.25\" x 5.25\" box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.1 lbs shipping weight\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eibach","offers":[{"title":"Default Title","offer_id":40729630277711,"sku":"EIB1600.300.0350S","price":101.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/eibach-ers-linear-main-spring-eibach_ae17ba5f.jpg?v=1766041894","url":"https:\/\/www.blackopsautoworks.com\/products\/eibach-ers-linear-main-spring","provider":"Black Ops Auto Works","version":"1.0","type":"link"}