-The ReadyLIFT 4" Rear Block Kit is designed to increase the rear height and restore additional rake on 2021–2026 Ford F-150 2WD and 4WD trucks.

Ideal for trucks used for towing or hauling, this kit replaces the factory rear blocks with two 4"-tall, OEM-style tapered cast-iron blocks. The added rear height creates additional rake, helping compensate for rear suspension compression caused by cargo or trailer tongue weight.

Unlike lightweight extruded blocks, ReadyLIFT’s cast-iron rear blocks are based on OEM designs and feature integrated bump-stop landings and cast-in center pins. This provides proper positioning between the axle and rear leaf springs while eliminating the need to stack rear blocks.

The kit includes two application-specific rear blocks, four E-coated U-bolts, eight M14 barrel nuts, eight heavy-duty washers, and a carrier-bearing drop with installation hardware.

The rear block kit can be used on stock-height, leveled, or lifted Ford F-150 trucks and is designed to work with compatible ReadyLIFT suspension leveling systems.

The physical blocks are 4 inches tall. Because the original factory blocks are removed during installation, the net increase in rear ride height will depend on the height of the original blocks, payload configuration, and the vehicle’s initial ride height.

Features

• Designed for 2021–2026 Ford F-150 models
• Compatible with 2WD and 4WD trucks
• Two 4"-tall OEM-style rear blocks
• Tapered driver- and passenger-side block design
• Heavy-duty cast-iron construction
• Integrated OEM-style bump-stop landings
• Cast-in locating center pins
• Replaces the factory rear blocks
• Creates additional rear rake for towing or hauling
• Eliminates the need to stack rear lift blocks
• Includes four E-coated U-bolts
• Includes eight M14 barrel nuts
• Includes eight heavy-duty M14 washers
• Includes a carrier-bearing drop and mounting hardware
• Compatible with stock-height, leveled, and lifted applications
• Designed to work with compatible ReadyLIFT leveling systems

Fitment

• 2021–2026 Ford F-150 — 2WD/4WD
  • Block Height: 4.0" | Suspension Position: Rear | Configuration: Leaf Spring

Specifications

• SKU: 26-21400
• Fitment: Vehicle-Specific Application
• Product Type: Rear Block Kit
• Drivetrain: 2WD/4WD
• Suspension Position: Rear
• Block Height: 4 Inches
• Net Rear Lift: Application-Dependent
• Block Design: Tapered OEM-Style
• Block Material: Cast Iron
• Bump-Stop Landing: Integrated
• Center Pin: Cast-In
• U-Bolt Finish: E-Coated
• U-Bolts Included: Yes
• Nuts Included: Yes
• Washers Included: Yes
• Carrier-Bearing Drop Included: Yes
• Installation Time: 1.8 Hours ±0.5 Hour, Excluding Alignment and Wheel/Tire Assembly
• Install Difficulty: Professional Installation Highly Recommended

Warranty

READYLIFT® “NO HASSLE” PRODUCT WARRANTY

This unique “no hassle” product warranty proves their commitment to the quality of every product that ReadyLIFT produces. ReadyLIFT product warranty only extends to the Original Purchaser of any ReadyLIFT product. If it breaks, they'll give you a new part.

Any ReadyLIFT products containing missing or defective components will be covered under warranty by ReadyLIFT. Please contact Recon Recovery to initiate a warranty claim. In the event of a defective product, ReadyLIFT may request a return of the defective product (at ReadyLIFT expense) so the quality team can analyze the nature of the defect. Returning defective product will not delay the replacement part delivery.

ReadyLIFT leveling kit, block kits and lift kit products are NOT intended for off-road abuse. Any abuse or damage as a result of off-road use voids the warranty of the ReadyLIFT product. Exception: ReadyLIFT Jeep SST and Terrain Flex Lift Kits are designed for normal off-road use to complement the Jeep vehicle's off-road capability. All Jeep Lift Kit products are covered under warranty when used in recreational off-road environments.

Wearable components including, but not limited to, shocks, ball joints, heim joints, bushings, and steering extensions, are covered for up to 1-year. Labor, installation, surcharges or any other applicable fees from the original purchase are non-refundable. ReadyLIFT is not responsible for any consequential damage to vehicles.