{"product_id":"carli-cs-ffsp-lvl-11-full-progressive-leaf-spring-ford-f250-f350-diesel-2011-2016","title":"Carli Suspension Full Progressive Leaf Spring Kit | 9-Leaf Main + 3-Leaf Overload | Block Eliminating | 15\" Rear Wheel Travel | 37\" Tire Fitment | 2011–2016 Ford F-250 \/ F-350 4WD Diesel — 3.5\" Axle Tube | SKU: CS-FFSP-LVL-11","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eVerified Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYear Range\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDrivetrain\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eAxle Tube\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011–2016\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-250 Super Duty\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eDiesel\u003c\/td\u003e\n\u003ctd\u003e3.5\" Dana 60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011–2016\u003c\/td\u003e\n\u003ctd\u003eFord\u003c\/td\u003e\n\u003ctd\u003eF-350 Super Duty\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003eDiesel\u003c\/td\u003e\n\u003ctd\u003e3.5\" Dana 60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e2017 and newer Ford F-250\/F-350 — different rear axle tube diameter (4.0\") and different leaf spring mounting geometry; separate Carli leaf spring kit required\u003c\/li\u003e\n\u003cli\u003e2010 and earlier Ford F-250\/F-350 — different platform\u003c\/li\u003e\n\u003cli\u003eFord F-250\/F-350 with 4.0\" axle tube — the 3.5\" axle tube is specific to the 2011–2016 diesel Super Duty; the 2017+ uses the larger 4.0\" tube\u003c\/li\u003e\n\u003cli\u003eFord F-250\/F-350 Gas — this spring is designed and load-tested with diesel-equipped trucks; gas applications may produce different results\u003c\/li\u003e\n\u003cli\u003eFord F-250\/F-350 2WD — leaf spring geometry and axle tube sizing are different on 2WD applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eAxle tube identification:\u003c\/strong\u003e The 3.5\" axle tube refers to the outer diameter of the Dana 60 front axle housing. The 2011–2016 diesel F-250\/F-350 4WD uses the 3.5\" tube. The 2017+ Super Duty uses a 4.0\" tube. To confirm your axle tube diameter, measure the outer diameter of the front axle housing at the center section. If you're uncertain, text (469) 407-7538 with your VIN before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eComponent Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eCS-FFSP-LVL-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eCarli Suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eDesigned by Carli Suspension — built by Deaver Leaf Spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2011–2016 Ford F-250 \/ F-350 4WD Diesel — 3.5\" axle tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFull replacement progressive leaf spring pack — replaces factory pack entirely\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring Pack Composition\u003c\/td\u003e\n\u003ctd\u003e9-leaf main pack + 3-leaf overload\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlock Eliminating\u003c\/td\u003e\n\u003ctd\u003eYes — no rear lift block required; spring pack achieves correct ride height without a block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Stance\u003c\/td\u003e\n\u003ctd\u003eProvides 1\/2\" rear high stance relative to Carli 2.5\" and 4.5\" leveling systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Rear Wheel Travel Supported\u003c\/td\u003e\n\u003ctd\u003eUp to 15 Inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Fitment\u003c\/td\u003e\n\u003ctd\u003e37\" recommended; up to 38\" possible with relocated center pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Pin\u003c\/td\u003e\n\u003ctd\u003eRelocated — accommodates up to 38-inch tires without interference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eNew U-bolts and rear bump stop drops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003eSlight reduction from standard 3\/4-ton — see Carli load testing data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarli Load Test Data\u003c\/td\u003e\n\u003ctd\u003eAvailable at carlisuspension.com — click \"LOAD TESTING\" on the product page\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$1,933.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e318 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Method\u003c\/td\u003e\n\u003ctd\u003eLTL freight — residential delivery included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFactory vs. Carli Full Progressive leaf spring — the design difference:\u003c\/strong\u003e The factory 2011–2016 Super Duty rear leaf spring pack uses 2–4 heavy main springs plus an immobile lower overload — a configuration Carli describes as \"making for a jarring ride.\" The heavy main springs carry load aggressively from the first inch of compression; the immobile overload engages suddenly when the main springs bottom against it, creating the abrupt transition that Super Duty owners experience as a harsh, stiff ride when unloaded. The Carli\/Deaver 9-leaf main + 3-leaf overload pack replaces this with a progressive rate design: the rate builds gradually as successive leaves engage, producing a softer initial compression under light load and a smooth, progressive stiffening as load increases. The result is meaningfully more compliant unloaded ride, more rear suspension travel, and retained capacity as the pack compresses to full engagement.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhy block eliminating matters:\u003c\/strong\u003e A standard rear lift block is installed between the axle perch and the leaf spring pack to create ride height. Lift blocks introduce axle wrap — particularly under hard acceleration or braking — because the block's height creates leverage against the U-bolt clamp, allowing the axle to rotate slightly in the spring perch. The Carli Full Progressive leaf spring pack achieves the correct rear ride height without a block, eliminating that axle wrap mechanism and allowing the suspension to cycle correctly through its full 15-inch travel.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003e1\/2\" rear high stance — calibrated intentionally:\u003c\/strong\u003e Carli designs this spring to sit 1\/2\" higher at the rear relative to the Carli 2.5\" and 4.5\" front leveling systems. This slight rear-high stance produces a level truck under normal load conditions — the rear compresses slightly under payload and towing weight, bringing the truck to level. Running the spring under constant zero-load produces a slightly tail-high appearance by approximately 1\/2\".\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat Is and Is NOT Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eIncluded\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eNOT Included\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull Progressive leaf spring pack — pair (driver and passenger)\u003c\/td\u003e\n\u003ctd\u003eCarli Pathfinder base system (CS-FLVL-PF-11 — sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNew U-bolts\u003c\/td\u003e\n\u003ctd\u003eProfessional installation labor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear bump stop drops\u003c\/td\u003e\n\u003ctd\u003eAlignment — not directly required for rear spring installation but recommended after any suspension system change\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eLoad testing data is publicly available.\u003c\/strong\u003e Carli provides comprehensive load testing documentation for the CS-FFSP-LVL-11 on their website. Before ordering — especially if your application involves regular towing or payload — review the load test results to confirm the spring is appropriate for your specific load profile. Text (469) 407-7538 for a direct link.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCritical Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003e3.5\" axle tube is the primary technical gate.\u003c\/strong\u003e The leaf spring center pin, U-bolt spacing, and spring eye geometry are all dimensioned for the 3.5\" axle tube on the 2011–2016 diesel F-250\/F-350 4WD. The 2017+ Super Duty's 4.0\" axle tube uses different dimensions throughout. Ordering this spring for a 2017+ truck produces hardware that will not fit correctly.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCarli Pathfinder system compatibility — shock tuning is calibrated for this spring.\u003c\/strong\u003e The CS-FFSP-LVL-11 is the spring that Carli's Pathfinder (CS-FLVL-PF-11) and Backcountry (CS-FLVL-BC-CS-11) shock valving is calibrated for. Carli explicitly states their shock tuning is optimized for use with this spring pack. Running Carli shocks on factory leaf springs, or running this spring under non-Carli shocks, produces a mismatched front-rear damping balance.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eF-350 rear spring note.\u003c\/strong\u003e The F-350 has stiffer factory main springs than the F-250 due to higher payload ratings. The Add-a-Pack (CS-FPAP-11) adds progressive leaves to whatever is already in the truck — on an F-350 with a 3-spring main pack, the Add-a-Pack provides minimal benefit when the truck is unloaded. The Full Progressive pack (CS-FFSP-LVL-11) replaces the factory pack entirely with a purpose-built progressive design — this is why Carli specifically recommends the Full Progressive pack for F-350 applications running a Carli leveling system.\u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eScenario\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011–2016 F-250 \/ F-350 4WD diesel — 3.5\" axle tube\u003c\/td\u003e\n\u003ctd\u003eConfirmed fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaired with Carli 2.5\" leveling system (Pathfinder, Backcountry, or Pintop)\u003c\/td\u003e\n\u003ctd\u003eConfirmed — shock tuning calibrated for this spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaired with Carli 4.5\" lift system\u003c\/td\u003e\n\u003ctd\u003eConfirmed per Carli product description\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017 and newer F-250 \/ F-350\u003c\/td\u003e\n\u003ctd\u003eDoes NOT fit — 4.0\" axle tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas-powered F-250 \/ F-350\u003c\/td\u003e\n\u003ctd\u003eNot the confirmed application — load testing based on diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF-250 \/ F-350 2WD\u003c\/td\u003e\n\u003ctd\u003eDoes NOT fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRunning without a Carli leveling system\u003c\/td\u003e\n\u003ctd\u003eWill function — shock\/spring matching benefit requires Carli shocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSkill level:\u003c\/strong\u003e Intermediate to advanced — full rear leaf spring replacement on a 3\/4-ton solid rear axle truck. Heavy axle, significant disassembly. Professional installation strongly recommended.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eTools required:\u003c\/strong\u003e Vehicle lift or floor jack with rated stands (must safely support F-250\/F-350 rear axle weight), spring pry bars, torque wrench, basic socket set.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eInstallation sequence:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col dir=\"ltr\"\u003e\n\u003cli\u003eSafely support the vehicle and place rated jack stands under the frame — the rear axle must be at full droop.\u003c\/li\u003e\n\u003cli\u003eDisconnect rear shocks from the lower mount (both sides).\u003c\/li\u003e\n\u003cli\u003eRemove factory U-bolts and factory rear blocks.\u003c\/li\u003e\n\u003cli\u003eLoosen spring eye front and rear mounts.\u003c\/li\u003e\n\u003cli\u003eLower the axle and remove the factory leaf spring pack.\u003c\/li\u003e\n\u003cli\u003eInstall the Carli\/Deaver Full Progressive spring pack — align the relocated center pin with the axle perch.\u003c\/li\u003e\n\u003cli\u003eInstall the new Carli U-bolts and rear bump stop drops.\u003c\/li\u003e\n\u003cli\u003eTorque U-bolts to Carli specification with the axle at ride height — not at full droop.\u003c\/li\u003e\n\u003cli\u003eReconnect rear shocks.\u003c\/li\u003e\n\u003cli\u003eLower the vehicle to ride height and confirm stance.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eNo factory block — do not reinstall the OEM block.\u003c\/strong\u003e The Carli Full Progressive spring pack achieves the correct ride height without the factory block. Do not reinstall the factory block alongside this spring — doing so would over-lift the rear.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eLTL freight notice.\u003c\/strong\u003e At 318 lbs, this ships LTL freight. Residential delivery included — the freight carrier will contact you to schedule a delivery window. Inspect for damage before signing the delivery receipt. Note any damage on the bill of lading before accepting.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhy is a full replacement spring better than the Add-a-Pack?\u003c\/strong\u003e\u003cbr\u003eThe Add-a-Pack (CS-FPAP-11) supplements the factory spring pack by adding progressive leaves on top of what's already there. The factory main springs and immobile overload remain in place. The Full Progressive pack (CS-FFSP-LVL-11) removes the factory pack entirely and replaces it with a purpose-built 9-leaf main + 3-leaf overload design co-developed with Deaver Leaf Spring. The result is a fundamentally different spring rate curve — progressive from the first inch of compression, supporting up to 15 inches of rear wheel travel, without the abrupt transition of the factory immobile overload engaging.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWill this affect my payload capacity?\u003c\/strong\u003e\u003cbr\u003eSlightly — Carli specifies \"a slight reduction from a standard 3\/4-ton load capacity.\" Carli provides comprehensive load testing data on their website that quantifies this. Review the load test before ordering if your application involves regular near-capacity payloads. For typical towing and hauling use, the difference is not operationally significant for most owners.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhy does this spring sit 1\/2\" rear-high?\u003c\/strong\u003e\u003cbr\u003eCarli calibrated the spring to produce a 1\/2\" rear-high stance when the truck is unloaded. Under normal payload and towing loads, the rear compresses to a level stance. This slight rear-high provides a buffer against the tail-down appearance that a precisely level spring produces under even light loads.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eDoes this work with the 4.5\" Carli lift, or only the 2.5\" leveling system?\u003c\/strong\u003e\u003cbr\u003eBoth. Carli explicitly states this spring is designed and calibrated for their 2.5\" and 4.5\" suspension lifts for the 2011–2016 Super Duty.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWhat is the recommended tire size with this spring?\u003c\/strong\u003e\u003cbr\u003eCarli recommends 37\" tires as the optimal fitment. The center pin is relocated to accommodate up to 38-inch tires. The rear bump stop drops included in this kit help maintain correct bump stop engagement at the new ride height with larger tires.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThe Obsidian Take\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe CS-FFSP-LVL-11 is the single most impactful rear suspension upgrade available for the 2011–2016 diesel Super Duty running a Carli leveling system — and the reason Carli marks it as the default recommended rear spring selection on every Pathfinder, Backcountry, and Pintop system page.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe factory rear leaf spring pack on these trucks is calibrated for maximum GVWR — heavy main springs and a hard-engaging immobile overload that delivers the harshest possible unloaded ride in exchange for excellent maximum payload control. For the majority of owners who are not running near GVWR daily, that is the wrong spring for their actual use.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eCarli and Deaver built the 9-leaf main + 3-leaf overload replacement specifically to address this. The progressive rate means the truck rides on the lighter main leaves when unloaded, with each additional leaf progressively contributing as load increases. The 15 inches of supported rear wheel travel is more than twice what a block-lift rear configuration delivers — and without the block, the axle wrap mechanism that blocks introduce under hard acceleration and braking is eliminated.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe shock calibration point matters: Carli's rear shock valving on the Pathfinder, Backcountry, and Pintop is tuned for the CS-FFSP-LVL-11. Running factory leaf springs with Carli shocks, or running this spring with non-Carli dampers, produces a front-rear damping mismatch that defeats the purpose of a system-level suspension build. This spring and Carli's shocks are a matched pair — order them together.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThis SKU is for:\u003c\/strong\u003e 2011–2016 Ford F-250 and F-350 4WD diesel owners (3.5\" axle tube) running a Carli 2.5\" or 4.5\" leveling system who want the complete rear suspension transformation — full progressive leaf spring replacement, block-eliminated 15\" rear travel, 37-inch tire fitment, and shock valving that's calibrated for this specific spring pack.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThis SKU is NOT for:\u003c\/strong\u003e 2017 and newer Super Duty owners (4.0\" axle tube — different kit required), gas-engine Super Duty owners, 2WD owners, anyone expecting to pair this with factory or non-Carli shocks without understanding the damping trade-off, or anyone running constant maximum payload loads without reviewing Carli's load testing data first.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eManufacturer Data Disclaimer\u003c\/strong\u003e\u003cbr\u003eProduct specifications, fitment data, and feature details are sourced directly from Carli Suspension's product page and manufacturer documentation current at the time of publication. Carli Suspension reserves the right to modify product specifications without notice. Confirm 2011–2016 model year, diesel engine, 4WD drivetrain, and 3.5\" axle tube before ordering. OFAS is not responsible for incompatibility resulting from 2017+ axle tube applications, gas engine applications, 2WD configurations, or non-Carli shock pairings.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eProp 65 Warning\u003c\/strong\u003e\u003cbr\u003e⚠ WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, go to \u003ca href=\"http:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eNon-Returnable Notice\u003c\/strong\u003e\u003cbr\u003eThis item is non-returnable once installed. Verify 2011–2016 model year, diesel engine, 4WD drivetrain, and 3.5\" axle tube before ordering. Questions before ordering? Text (469) 407-7538.\u003c\/p\u003e","brand":"Carli Suspension","offers":[{"title":"Default Title","offer_id":52118429303105,"sku":"CS-FFSP-LVL-11","price":1933.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/CS-FFSP-LVL-11.jpg?v=1787616732","url":"https:\/\/obsidianforgedautosupply.com\/products\/carli-cs-ffsp-lvl-11-full-progressive-leaf-spring-ford-f250-f350-diesel-2011-2016","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}