{"product_id":"king-shocks-3-0-inch-id-coil-spring-12-inch-length-400-lb-spring-rate","title":"King Shocks 3.0-Inch ID Coil Spring, 12-Inch Length, 400 lb. Spring Rate","description":"King coil springs are manufactured to our specifications in the USA using the finest quality, high tensile, chrome silicon wire available. Our springs are specifically wound for off-road applications, not repackaged car springs. Our spring rates, wire diameters, and coil lengths have been developed through extensive real world testing on all types of terrain. Our race winning designs have been put to the test in the heat of battle from Baja to Dakar. All springs have closed and ground ends to sit flat and deflect true. We have the largest selection of springs to match your application. We sell thousands of springs a month with barely a return ever, yet we offer a lifetime warranty to the original purchaser against sagging and breakage. You will have the added peace of mind knowing you're covered, just in case. In the rare occurrence that a spring does fail, it will be cheerfully replaced with no questions asked. Our customer support is second to none just like the quality and performance of our products. Nothing rides like a King.\nCoil Spring; 3.0 in.; 12 in. Length\/400 lbs. Spring Rate;\n\u003cul\u003e\n  \u003cli\u003eCoils Are Made From The Finest Quality; High Tensile; Chrome Silicon Wire Available\u003c\/li\u003e\n  \u003cli\u003eKing Coil Springs Are Manufactured To Our Specifications Right Here In The USA\u003c\/li\u003e\n  \u003cli\u003eCoils Are Closed And Ground To Sit Flat And Deflect True\u003c\/li\u003e\n  \u003cli\u003eOver 10;000 Springs In Stock And Ready To Ship\u003c\/li\u003e\n  \u003cli\u003eSpecifically Wound For Off-Road Applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe King Shocks 3.0-Inch ID Coil Spring is engineered specifically for off-road suspension applications where consistent performance, durability, and dependable ride quality are essential. This coil spring features a 12-inch free length and a 400 lb. spring rate, making it a practical choice for suspension systems requiring controlled compression and reliable support. King Shocks manufactures its springs in the USA using high-tensile chrome silicon wire selected for strength and long-term performance.\u003c\/p\u003e\n\u003cp\u003eUnlike repackaged automotive springs, King Shocks coil springs are specifically wound for off-road use. Their spring rates, wire diameters, and coil lengths are developed through extensive real-world testing across demanding terrain, including desert racing and other high-stress applications. Each spring is designed to provide predictable deflection and consistent behavior during suspension travel.\u003c\/p\u003e\n\u003cp\u003eThe coil features closed and ground ends that sit flat in the spring seats and help the spring deflect correctly. King Shocks supports the original purchaser with a lifetime warranty against sagging and breakage, providing additional confidence for demanding off-road use. The King Shocks part number kinSPR3-12-400 identifies this 3.0-inch inside-diameter coil spring with a 12-inch length and 400 lb. spring rate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Fitment depends on the vehicle, suspension configuration, installed height, and required spring rate. Verify compatibility with the vehicle and suspension manufacturer before installation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOff-Road Specific Design: Specifically wound for off-road suspension applications rather than adapted from passenger-car springs.\u003c\/li\u003e\n\u003cli\u003eHigh-Strength Construction: Manufactured in the USA from high-tensile chrome silicon wire for durability and consistent performance.\u003c\/li\u003e\n\u003cli\u003eFlat-Seating Ends: Closed and ground ends sit flat in the spring seats and help promote true, predictable deflection.\u003c\/li\u003e\n\u003cli\u003eLifetime Warranty: Covered against sagging and breakage for the original purchaser, subject to King Shocks warranty terms.\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: t\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":"King Shocks","offers":[{"title":"Default Title","offer_id":67695263940860,"sku":"SPR3-12-400","price":147.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/e4bb0a71a79dd9cdb29988957c757e8a_c79a0c73-cfdc-42a8-871f-4fcfadf102e5.png?v=1791920386","url":"https:\/\/diycustoms.store\/products\/king-shocks-3-0-inch-id-coil-spring-12-inch-length-400-lb-spring-rate","provider":"diycustoms.store","version":"1.0","type":"link"}