3 in Block and U-bolt Kit — Ford F-250 1999–2026

KINGROCK KR-2412 3-Inch Rear Block and U-Bolt Kit — Ford F-250 1999–2026

Adjust the rear ride height of your Ford F-250 with the KINGROCK KR-2412 kit. It includes two suspension blocks, four U-bolts and mounting hardware to change suspension height while retaining the existing leaf springs.

The blocks feature welded construction with internal reinforcement and one locating pin per block. Their tapered profile provides a height ranging from 2 13/16 inches to 3 inches. The black finish on the blocks and U-bolts blends neatly with the suspension components.

Features and Benefits

• Application: Ford F-250 1999–2026.
• Nominal 3-inch block height, with a tapered profile.
• Welded construction with internal reinforcement.
• One locating pin per block for positioning on compatible axle spring perches.
• U-bolts, nuts and washers included.
• Retains the existing leaf springs.
• Bolt-on installation.

Dimensions

Suspension blocks:

• Length: 5 inches.
• Width: 2 1/2 inches.
• Height: 3 inches at the taller end and 2 13/16 inches at the shorter end.

U-bolts:

• Length: 17 1/2 inches.
• Width: 3 3/4 inches.
• Thread: M16 × 1.5.

Kit Contents

• 2 rear suspension blocks.
• 4 U-bolts.
• 8 nuts.
• 8 flat washers.

Installation

The blocks install beneath the leaf springs, between the springs and the rear axle spring perches. The supplied U-bolts and hardware secure the assembly.

Block orientation: the shorter end, measuring 2 13/16 inches, must face the front of the vehicle. The 3-inch end must face the rear.

Check that the locating pins are properly seated, the blocks make full contact with the mounting surfaces, and shock length and suspension clearances are suitable for the vehicle’s configuration.

Block Height and Actual Lift

The nominal 3-inch measurement refers to the block’s height. When replacing an existing block, the change in ride height depends on the difference between the two blocks. A 3-inch block therefore does not necessarily provide an additional 3 inches of lift.

KINGROCK Warranty

The KINGROCK KR-2412 kit is backed by a lifetime warranty, subject to the KINGROCK warranty policy.