{"product_id":"rustys-fsj-3-5-4-full-size-spring-pack-lift-kit","title":"Rusty's FSJ 3.5\" - 4\" Full Size Spring Pack Lift Kit","description":"\u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSome suspension companies claim nothing has improved in the manufacturing of leaf spring in 25 years. Well not at Rusty's! While other companies continue to offer a 4 inch FSJ spring that was designed back in the 70's, many things have improved in the spring industry. Rusty's has incorporated many of these improvements in our FSJ springs, which are built in North America.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe 4\" lift front springs are constructed with 4 leafs that feature tapered leafs ends and anti-friction pads for a smooth ride. The leafs are shot-peened to further reduce stress and increase spring life. Only the best in rubber bushings are used, and the Rusty's front springs have a 310 lbs. spring rate. There is not a better spring pack built today.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe rear springs are a 6 leaf design with tapered leafs ends and anti-friction pads that reduce inter-leaf friction. Like the fronts, they are also shot-peened to reduce stress and increase spring life. Each spring is load-tested to ensure they meet the required specifications. The Rusty's rear springs have a 400 lbs. spring rate. Spring eye bushings and Grade 8 U-bolts round out the rear details.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTo finish up kit, a complete set of Rusty's Hydro shocks are included. These shocks provide excellent on- and off-road performance along with the proper length to work with this complete system.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe saying \"Often Copied, Never Duplicated\" certainly applies to Rusty's FSJ kits. 3-D computer modeling and extensive development and testing were all used to create a suspension that was second to none. This suspension offers a great on road ride, extra load capacity, and great articulation. Make sure you don't accept anything less than Rusty's!\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eKEY FEATURES:\u003c\/strong\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBest Quality Parts Built\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGreat Ride \u0026amp; Articulation\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eComplete Kit\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eKIT INCLUDES:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 2 - 3.5-4\" Front Leaf Springs\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 2 - 3.5\"-4\" Rear Springs\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 8 - Grade 8 U-Bolts\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Brake line Extension Brackets\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 4 - Rusty's Hydro Shocks\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Complete Instructions\u003c\/span\u003e\n\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ctable width=\"200\" border=\"0\"\u003e\n\n    \u003ctr\u003e    \n    \n        \u003ctd align=\"center\"\u003e\n        \n            \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0107\/0402\/7744\/files\/RK-350SP-FS.pdf?v=1670452054\" target=\"_blank\"\u003e\n            \n            \t\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0107\/0402\/7744\/files\/icon-instructions.png?v=1650314080\" hspace=\"10\" border=\"0\"\u003e\n            \n            \u003c\/a\u003e\n        \n        \u003c\/td\u003e \n \n    \u003c\/tr\u003e\n\n\u003c\/table\u003e","brand":"Rusty's Off Road Products","offers":[{"title":"RX100 Series (SKU: RX-13 \/ RX-13)","offer_id":49537612382518,"sku":"RK-350SP-FS-RX1","price":885.0,"currency_code":"USD","in_stock":true},{"title":"RX800 Series (SKU: R-813 \/ R-813)","offer_id":49537612415286,"sku":"RK-350SP-FS-RX8","price":1425.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/2726\/0726\/files\/rustys-fsj-3-5-4-full-size-spring-pack-lift-kit.jpg?v=1724046020","url":"https:\/\/offroadtradingco.com\/products\/rustys-fsj-3-5-4-full-size-spring-pack-lift-kit","provider":"Offroad Trading Company","version":"1.0","type":"link"}