Rear Block Kit 4.5in with U-Bolts

The Skyjacker Rear Block Kit 4.5in with U-Bolts is a leaf spring block suspension lift system engineered to deliver 4.5 inches of rear axle height gain on full-size GM trucks and SUVs from 1988–1999, and Dodge Ram full-size trucks spanning 1969–2001. This kit addresses the fundamental need for controlled suspension geometry when raising a vehicle's ride height—a critical concern for owners seeking increased ground clearance without compromising chassis alignment or component longevity.

Constructed from cast iron in natural (unpainted) finish, the block components resist corrosion in typical automotive service environments while maintaining structural rigidity under load. The inclusion of U-bolts in this kit eliminates the need for separate fastener sourcing—a genuine convenience for DIY installers and professional shops alike. At 25.95 pounds, the complete assembly is manageable for single-technician handling during installation. The rear block lift method mechanizes the relationship between spring rate and ride height, allowing the axle to travel vertically while the leaf springs maintain their designed arc, preserving damping characteristics and ride quality.

This product is purpose-built for truck and SUV owners who require additional ground clearance for off-road use, accommodate larger tires, or achieve a specific aesthetic lift profile. The 4.5-inch specification positions this kit in the moderate-lift category—substantial enough to improve approach and departure angles without introducing severe ride-height imbalance typical of more aggressive suspensions. All necessary hardware is included, streamlining the installation process for experienced installers.

Skyjacker has long established itself as a suspension specialist for truck and SUV platforms, and rear block kits remain a foundational product category within the lift system market. This kit's compatibility matrix spans multiple model years and platforms, making it a reliable choice for owners of applicable vehicles seeking a straightforward, proven suspension modification.