{"product_id":"eibach-ers-18-00-in-length-x-3-00-in-id-coil-over-spring","title":"Eibach ERS 18.00 in. Length x 3.00 in. ID Coil-Over Spring","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e1800.300.0450S\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 803050288073\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eEibach ERS 18.00 in. Length x 3.00 in. ID Coil-Over Spring - 450 lb\/in Rate, Universal Racing Fit\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEibach ERS 1800.300.0450S is a high-performance coil-over spring designed for racing and custom suspension setups. With 18-inch free length and 3-inch inside diameter, it fits most coil-over shocks from QA1, Bilstein, Fox, and similar systems. This 450 lb\/in linear rate spring delivers consistent damping response and stability under high loads for drag, road course, or off-road use.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e450 lb\/in Spring Rate:\u003c\/strong\u003e Provides firm resistance for sharp cornering and high-speed stability in demanding track conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.00 in. Free Length x 3.00 in. ID:\u003c\/strong\u003e Exact dimensions ensure drop-in compatibility with standard coil-over strut housings and perches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome Silicon Steel Alloy:\u003c\/strong\u003e High-tensile material resists fatigue for extended service life in motorsport environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShot-Peened and Preset:\u003c\/strong\u003e Increases surface strength and eliminates initial sag for reliable performance from lap one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquared\/Ground Ends \u0026amp; Silver Powder Coat:\u003c\/strong\u003e Ensures secure shock contact and corrosion protection for long-term durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVerify shock perch spacing matches 3 in. ID before installation.\u003c\/li\u003e\n\u003cli\u003eInspect for proper seating after 100 miles or 5 heat cycles.\u003c\/li\u003e\n\u003cli\u003eShips individually wrapped; store vertically to maintain shape.\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\u003eLubricate ends with silicone spray for smooth assembly on threaded bodies.\u003c\/li\u003e\n\u003cli\u003eCompatible with standard flat or bearing mount coil-over perches; torque to shock manufacturer specs.\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\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eCoil-Over Shocks\u003c\/td\u003e\n\u003ctd\u003e3 in. ID Applications (QA1, Bilstein, Fox, AFCO)\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\u003eProven in NASCAR, Formula Drift, and global racing series.\u003c\/li\u003e\n\u003cli\u003ePrecision-wound tolerances hold rate within 2% variation.\u003c\/li\u003e\n\u003cli\u003eGerman-engineered with USA manufacturing for consistent quality.\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 coil-over shocks does this spring fit?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Fits any coil-over with 3.00 in. ID perch, including QA1 Proma Star, Bilstein 5125, Fox 2.0, and AFCO drag struts. Confirm free length clearance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material and finish are used?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Chrome silicon high-tensile steel with silver epoxy powder coat for rust resistance and shot-peened for 200% longer fatigue life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and break-in process?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Lifetime guarantee against sag or failure when used as directed. Cycle 5 times unloaded before track use.\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 Ground\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 cardboard tube, 19 x 4 x 4 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.6 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eibach","offers":[{"title":"Default Title","offer_id":41368406851663,"sku":"EIB1800.300.0450S","price":103.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/eibach-ers-18_00-in_-length-x-3_00-in_-id-coil-over-spring-eibach_2878c1e3.jpg?v=1766042535","url":"https:\/\/www.blackopsautoworks.com\/products\/eibach-ers-18-00-in-length-x-3-00-in-id-coil-over-spring","provider":"Black Ops Auto Works","version":"1.0","type":"link"}