ReadyLIFT 5.0" OEM-Style Cast Iron Rear Block Kit | 2011–2016 Ford F-250/F-350 Super Duty 2WD/4WD SRW 1-Piece Driveshaft
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
ReadyLIFT 5.0" OEM-Style Cast Iron Rear Block Kit | 2011–2016 Ford F-250/F-350 Super Duty 2WD/4WD SRW 1-Piece Driveshaft
⚠️ Single Rear Wheel (SRW) trucks with 1-piece driveshaft only. Not for Dual Rear Wheel (DRW) configurations. Not compatible with aftermarket or factory air spring/load leveling kits attached to bump stop tangs.
Is This for You?
You're running a 2011–2016 Ford F-250 or F-350 Super Duty — 2WD or 4WD, single rear wheel, 1-piece driveshaft — and you need 5" of rear lift to match a front lift kit, restore towing rake, or increase rear load capacity. The ReadyLIFT 66-2025 is the OEM-style cast iron solution — never made from lightweight extrusions — with integrated OEM-style bump stop landings, 16.5" E-coated U-bolts, and a Limited Lifetime Warranty. Actual lift height will vary depending on what factory block your truck has.
The Result
Two OEM-style cast iron 5.0" rear lift blocks with integrated bump stop landings deliver up to 5.0" of rear lift on 2011–2016 Ford F-250/F-350 Super Duty SRW applications with a 1-piece driveshaft. Four 16.5" E-coated U-bolts, eight nuts, and eight washers are included. Designed to work in concert with ReadyLIFT leveling and lift kits and ideal as a tow package upgrade for stock, leveled, or lifted trucks requiring additional rear lift.
Verified Fitment (OFAS Standard)
✅ Fits: 2011–2016 Ford F-250 Super Duty (2WD and 4WD — Single Rear Wheel, 1-piece driveshaft)
✅ Fits: 2011–2016 Ford F-350 Super Duty (2WD and 4WD — Single Rear Wheel, 1-piece driveshaft)
❌ Does NOT fit: Dual Rear Wheel (DRW) configurations
❌ Does NOT fit: Trucks with a 2-piece driveshaft
❌ Does NOT fit: Trucks equipped with aftermarket or factory air spring/load leveling kits that attach to the bump stop tangs — use of this type of air bag system will void all block warranties and can cause block failure
❌ Note: Actual lift height will vary depending on what factory block your truck has
| Spec | Detail |
|---|---|
| Rear Lift Height | Up to 5.0" (varies by factory block height) |
| Construction | OEM-style cast iron — integrated bump stop landings |
| Included Components | (2) 5" cast iron rear lift blocks, (4) 16.5" E-coated U-bolts, (8) nuts, (8) washers |
| Driveshaft Requirement | 1-piece driveshaft only |
| Axle Configuration | Single Rear Wheel (SRW) only |
| Warranty | ReadyLIFT Limited Lifetime Warranty |
| SKU | 66-2025 |
| Manufacturer | ReadyLIFT |
Installation & Engineering Notes
All U-bolt hardware must be torqued to specification at ride height — do not torque with the suspension unloaded. Re-torque U-bolts after the first 500 miles of driving. Do not use with aftermarket or factory air spring/load leveling kits that attach to the bump stop tangs — this will void the block warranty and can cause structural failure of the bump stop tang. A professional alignment check is recommended after installation. Lifting the rear of your vehicle raises its center of gravity; exercise appropriate caution when towing or hauling.
Engineering Question: Is your 2011–2016 Ford Super Duty a Single Rear Wheel (SRW) configuration with a 1-piece driveshaft, and does your truck have any aftermarket or factory air spring/load leveling kit attached to the bump stop tangs? Confirm all three before ordering — DRW, 2-piece driveshaft, and air bag systems are not compatible with this block kit.