{"product_id":"carli-cs-ffsp-17-hd","title":"Carli Suspension Heavy-Duty Leaf Spring Kit | 2017–2026 Ford F-250\/F-350 SRW","description":"\u003ch2\u003eCarli Suspension Heavy-Duty Leaf Spring Kit | 2017–2026 Ford F-250\/F-350 SRW | SKU: CS-FFSP-17-HD\u003c\/h2\u003e\n\n\u003ch2\u003eIs This for You?\u003c\/h2\u003e\n\u003cp\u003eThis kit is for the \u003cstrong\u003e2017–2026 Ford F-250 or F-350 SRW owner\u003c\/strong\u003e who needs improved rear load control, tow stability, and reduced rear sag under heavy payload. This is a rear leaf spring replacement — not a lift system. If you have a Ram 2500\/3500, stop here — Ram-specific leaf spring kits are listed separately. If you have an F-350 DRW (Dually), stop here — this kit does not fit DRW applications. If you want a complete front and rear lift system, see the Dominator or Backcountry system listings.\u003c\/p\u003e\n\n\u003ch2\u003eThe Result\u003c\/h2\u003e\n\u003cp\u003eProgressive-rate rear leaf pack engineered for the 2017–2026 Super Duty SRW — improved tow stability, reduced rear squat under load, and better overall ride quality when hauling. Carli-engineered spring rates matched to the Super Duty’s chassis and payload ratings.\u003c\/p\u003e\n\n\u003ch2\u003eVerified Fitment (OFAS Standard)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFord F-250 Super Duty SRW:\u003c\/strong\u003e 2017–2026\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFord F-350 Super Duty SRW:\u003c\/strong\u003e 2017–2026\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e F-350 DRW (Dually) — different rear axle and spring configuration. Does NOT fit 2016 or earlier F-250\/F-350. Does NOT fit F-150. Confirm SRW vs DRW before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eSystem Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e CS-FFSP-17-HD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Carli Suspension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit:\u003c\/strong\u003e Heavy-Duty Rear Leaf Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Rate:\u003c\/strong\u003e Progressive — Carli-engineered for Super Duty SRW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 2017–2026 Ford F-250\/F-350 SRW\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMaster Kit Components\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCarli Heavy-Duty progressive-rate rear leaf spring pack (pair)\u003c\/li\u003e\n\u003cli\u003eConfirm full kit contents via contact form or Carli spec sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation \u0026amp; Fabrication Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional installation recommended:\u003c\/strong\u003e Rear leaf spring replacement requires proper jack stands, spring compressors, and torque tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque specs:\u003c\/strong\u003e Follow Carli installation manual torque specifications for all U-bolt and shackle hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo alignment required:\u003c\/strong\u003e Rear leaf spring replacement does not affect front alignment. Confirm with your installer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreak-in period:\u003c\/strong\u003e Allow 500–1,000 miles for springs to settle to rated height.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWheel \u0026amp; Tire Fitment\u003c\/h2\u003e\n\u003cp\u003eThis is a rear spring replacement — does not change rear lift height significantly. Confirm tire clearance with your installer if running oversized tires. Submit your setup via the contact form for a recommendation.\u003c\/p\u003e\n\n\u003cblockquote\u003e\u003cp\u003eIs your Super Duty a 2017–2026 F-250 or F-350 SRW? What payload and tow setup are you running? Submit via the contact form and we’ll confirm fitment before it ships.\u003c\/p\u003e\u003c\/blockquote\u003e","brand":"Carli Suspension","offers":[{"title":"Default Title","offer_id":51417398935873,"sku":"CS-FFSP-17-HD","price":2474.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/CISCS-FFSP-17-HD.jpg?v=1772025533","url":"https:\/\/obsidianforgedautosupply.com\/products\/carli-cs-ffsp-17-hd","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}