{"product_id":"eibach-ers-4-00-in-length-x-2-25-in-id-coil-over-spring-1-800-lb-in-rate-0400-225-1800","title":"Eibach ERS 4.00 in. Length x 2.25 in. ID Coil-Over Spring, 1,800 lb\/in Rate - 0400.225.1800","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 Spring is engineered for serious race and high-performance suspension applications. Built around Eibach’s established Race Spring System, this coil-over spring delivers a highly consistent spring rate and predictable suspension response for drivers, builders, and race teams who demand precise vehicle control. The spring is designed for compatible coil-over assemblies using a 2.25-inch inside diameter and a 4.00-inch free length.\u003c\/p\u003e\u003cp\u003eManufactured in repeated series production, the Eibach ERS spring benefits from controlled manufacturing processes, consistent materials, and extensive spring-production experience. Its 1,800 lb\/in rate is suited to applications requiring substantial suspension support, helping maintain chassis control under heavy cornering, braking, acceleration, and aerodynamic loads. The linear spring characteristic provides more predictable performance throughout the working range, making suspension setup and tuning more repeatable.\u003c\/p\u003e\u003cp\u003ePart number 0400.225.1800 is intended for motorsport and specialized performance use. Confirm coil-over compatibility, installed height, travel requirements, spring rate selection, and suspension clearance before installation. This universal race spring does not identify vehicle-specific fitment, so professional suspension setup is recommended. The Eibach ERS system is designed to help users fine-tune vehicle balance and handling through accurately selected spring rates.\u003c\/p\u003e\u003ch3\u003eProduct Specifications and Technical Data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: Eibach\u003c\/li\u003e\n\u003cli\u003ePart Number: 0400.225.1800\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\u003eFree Length: 4.00 inches\u003c\/li\u003e\n\u003cli\u003eInside Diameter: 2.25 inches\u003c\/li\u003e\n\u003cli\u003eSpring Rate: 1,800 lb\/in\u003c\/li\u003e\n\u003cli\u003eApplication: Universal motorsport and performance suspension use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOne Eibach ERS coil-over spring\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eFitment data should be verified against the vehicle, coil-over hardware, suspension design, and intended racing application before purchase. This product is not identified as vehicle-specific.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLinear spring characteristic: Delivers predictable suspension response and consistent handling behavior across the working range.\u003c\/li\u003e\n\u003cli\u003e1,800 lb\/in spring rate: Provides substantial support for demanding race and high-performance suspension setups.\u003c\/li\u003e\n\u003cli\u003ePrecision manufacturing: Produced in repeated series production to maintain consistent rates and tight manufacturing tolerances.\u003c\/li\u003e\n\u003cli\u003eRace-focused ERS design: Supports accurate suspension tuning for coil-over systems used in motorsport and performance applications.\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Eibach","offers":[{"title":"Default Title","offer_id":67581372956924,"sku":"0400.225.1800","price":106.79,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/c24c7ce5c049c03c6a9b0b46035ed1bd_b2105569-f137-4756-948a-fe4a85e3babb.jpg?v=1790407314","url":"https:\/\/diycustoms.store\/products\/eibach-ers-4-00-in-length-x-2-25-in-id-coil-over-spring-1-800-lb-in-rate-0400-225-1800","provider":"diycustoms.store","version":"1.0","type":"link"}