{"product_id":"eibach-ers-4-00-inch-length-x-2-25-inch-id-coil-over-race-spring-300-lb-in","title":"Eibach ERS 4.00-Inch Length x 2.25-Inch ID Coil-Over Race Spring, 300 lb\/in","description":"Eibach's ERS line has evolved over the years to be the world's most prominent, comprehensive and superior Race Spring System. Eibach Race Springs are all manufactured in series production, often repeated, with a strong manufacturing experience. Thus, Eibach constantly achieves the most linear spring characteristic (rate) while maintaining the lowest tolerances and the highest quality in the industry.\n\u003cp\u003eThe Eibach ERS Coil-Over Race Spring is engineered for professional and enthusiast racing applications that demand predictable suspension performance and consistent spring behavior. Manufactured as part of Eibach’s comprehensive ERS Race Spring System, this coil-over spring is designed to deliver a highly linear spring rate throughout its operating range.\u003c\/p\u003e\u003cp\u003eEibach produces ERS springs in repeated series production using established manufacturing processes. This helps maintain tight tolerances, consistent performance, and dependable quality from spring to spring. The 300 lb\/in rate provides a precise foundation for tuning vehicle suspension geometry, balance, and handling characteristics when matched with the correct coil-over hardware and application requirements.\u003c\/p\u003e\u003cp\u003eIts compact racing format uses a 4.00-inch spring length and 2.25-inch inside diameter for compatibility with properly sized coil-over suspension assemblies. The spring is intended for motorsports and performance applications where reliable rate consistency and repeatable setup changes are essential. Confirm vehicle, damper, perch, and suspension compatibility before installation.\u003c\/p\u003e\u003ch3\u003eKey Product Specifications \u0026amp; Technical Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: Eibach\u003c\/li\u003e\n\u003cli\u003ePart Number: EIB0400.225.3000\u003c\/li\u003e\n\u003cli\u003eProduct Line: ERS Race Spring System\u003c\/li\u003e\n\u003cli\u003eSpring Type: Coil-over race spring\u003c\/li\u003e\n\u003cli\u003eSpring Rate: 300 lb\/in\u003c\/li\u003e\n\u003cli\u003eSpring Length: 4.00 inches\u003c\/li\u003e\n\u003cli\u003eInside Diameter: 2.25 inches\u003c\/li\u003e\n\u003cli\u003eApplication: Automotive motorsports and performance suspension systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eOne Eibach ERS coil-over race spring. Coil-over hardware, spring seats, adjusters, and installation components are not included unless specified separately.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLinear Spring Rate: Supports predictable suspension response and repeatable vehicle tuning.\u003c\/li\u003e\n\u003cli\u003eSeries Production Manufacturing: Helps maintain consistent spring characteristics and tight production tolerances.\u003c\/li\u003e\n\u003cli\u003eRacing-Focused Design: Developed for motorsports and high-performance coil-over suspension applications.\u003c\/li\u003e\n\u003cli\u003e300 lb\/in Spring Rate: Provides a precise performance baseline for suspension setup and chassis balance.\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: Unknown\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Eibach","offers":[{"title":"Default Title","offer_id":67581406871804,"sku":"0400.225.3000","price":109.79,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/c24c7ce5c049c03c6a9b0b46035ed1bd_1e991425-25bd-4632-a519-561aee1080f9.jpg?v=1790407580","url":"https:\/\/diycustoms.store\/products\/eibach-ers-4-00-inch-length-x-2-25-inch-id-coil-over-race-spring-300-lb-in","provider":"diycustoms.store","version":"1.0","type":"link"}