Tuff Country # 97073 block kit include lift blocks and ubolts designed to raise the rear of your Ford F150. Installation is done by inserting the cast lift blocks between the factory rear leaf springs and axle. Extended zinc plated rear ubolts designed specifically for the Ford F150 are use to replace the factory ubolts.
Installation Note
1. Designed for rear axles only. Never use lift blocks with a front axle.
2. Included 5" blocks replace the factory 1. 5" blocks.
3. On most applications factory length shocks must be replaced with extended length shocks when installing rear blocks 2" in height or taller. Please see our "Shock Absorbers" section for applications.
Features
Lifts the rear of your vehicle 3.5" (replaces factory block)
Maintains a factory ride
Custom made for the Ford F150
Lift blocks are constructed of heavy duty cast iron
Zinc plated corrosion resistant extended ubolts
Simple Bolt-on Installation
Specification
Amount of Lift: 3.5" Rear Lift (replaces factory blocks)

Blocks Tapered (YES/NO): No

Lift Block Dimensions: 5" (H) x 2 1/2" (W) x 5 1/2" (L)

Ubolt Dimensions: 9/16" x 3" x 14 5/8" - Square