{"product_id":"eibach-ers-4-00-inch-coilover-spring-3-00-inch-inside-diameter-350-lb-in-rate","title":"Eibach ERS 4.00-Inch Coilover Spring, 3.00-Inch Inside Diameter, 350 lb\/in Rate","description":"Renowned for our extensive catalog of over 1,500 precision engineered race springs. Eibach race springs offer unparalled customization and performance optimization across a wide spectrum of racing applications. From shocks to pull-bars we offer a wide range of springs solutions to fine tune the handling dynamics of your race car.\nIndividual Motorsport Spring\n\u003cul\u003e\n  \u003cli\u003eEibach 3.00\" Inside Diameter Coilover Springs Available in a Full Range of Rates and Lengths\u003c\/li\u003e\n  \u003cli\u003eMaximum Travel in Combination with Smallest Block Heights\u003c\/li\u003e\n  \u003cli\u003eLegendary Eibach Off-Road Durability and Performance\u003c\/li\u003e\n  \u003cli\u003eHighest Linearity and Guaranteed Consistency\u003c\/li\u003e\n  \u003cli\u003eEach Spring Individually Tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Eibach ERS Individual Motorsport Spring is engineered for race vehicles requiring precise suspension tuning and dependable performance. This coilover spring features a 3.00-inch inside diameter, a 4.00-inch free length, and a 350 lb\/in spring rate for tailored handling characteristics across a wide range of motorsport applications. Eibach part number EIB0400.300.0350S is designed for use with compatible coilover suspension systems and race-focused setups.\u003c\/p\u003e\u003cp\u003eBuilt from Eibach’s extensive experience producing precision-engineered racing springs, this ERS spring delivers excellent travel potential while maintaining a compact block height. Its carefully controlled spring characteristics support predictable suspension response, helping drivers and suspension tuners optimize grip, balance, and handling behavior. Each spring is individually tested to help ensure consistent performance from one component to the next.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e One Eibach ERS individual motorsport coilover spring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Universal motorsport application for compatible coilover systems using a 3.00-inch inside diameter spring. Verify spring rate, free length, coilover compatibility, and suspension requirements before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProduct Specifications \u0026amp; Technical Data:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Eibach\u003c\/li\u003e\n\u003cli\u003ePart Number: EIB0400.300.0350S\u003c\/li\u003e\n\u003cli\u003eProduct Type: Individual motorsport coilover spring\u003c\/li\u003e\n\u003cli\u003eInside Diameter: 3.00 inches\u003c\/li\u003e\n\u003cli\u003eFree Length: 4.00 inches\u003c\/li\u003e\n\u003cli\u003eSpring Rate: 350 lb\/in\u003c\/li\u003e\n\u003cli\u003eApplication: Racing and performance coilover suspension systems\u003c\/li\u003e\n\u003cli\u003eConstruction: Precision-engineered spring with individually tested consistency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e3.00-inch inside diameter supports compatibility with a broad range of racing coilover systems.\u003c\/li\u003e\n\u003cli\u003e350 lb\/in spring rate enables precise suspension tuning for race and performance applications.\u003c\/li\u003e\n\u003cli\u003e4.00-inch free length helps provide a compact setup for applications requiring controlled suspension packaging.\u003c\/li\u003e\n\u003cli\u003eEibach motorsport engineering delivers dependable durability, linear response, and consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\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: false\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\u003eCarb Acknowledgement Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: false\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":"Eibach","offers":[{"title":"Default Title","offer_id":67581470802172,"sku":"0400.300.0350S","price":120.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/25d6bed76a290e07e259e5b48ee06a11L_0214a686-0804-4174-ab0b-c80ae636fa88.jpg?v=1790407884","url":"https:\/\/diycustoms.store\/products\/eibach-ers-4-00-inch-coilover-spring-3-00-inch-inside-diameter-350-lb-in-rate","provider":"diycustoms.store","version":"1.0","type":"link"}