Suspension Body Block

What Are Suspension Body Blocks?

Suspension body blocks are one of the most straightforward ways to add rear lift height to a leaf-sprung truck or SUV. Lift blocks insert between the rear axle and the OEM leaf springs, increasing the distance between the axle and the frame to raise the vehicle's rear end. They're secured in place with U-bolts and, in most kits, include all necessary hardware for a complete installation.

Unlike add-a-leaf kits, lift blocks work without stiffening the spring rate — meaning your truck's rear ride quality largely stays intact. They're a popular choice for owners who want to level a truck that's sitting nose-down, accommodate the weight of a loaded bed or trailer hitch setup, or create clearance for larger tires without committing to a full suspension overhaul.

When Do You Need a Lift Block?

Pickup trucks are typically engineered with the rear end sitting slightly higher than the front to compensate for cargo weight. After installing a front suspension lift, that factory rake can disappear — leaving the truck with an awkward, nose-high stance. A rear lift block corrects this balance, bringing the back end up to match the new front height. Similarly, trucks that haul heavy gear — winches, steel bumpers, equipment beds — may sag in the rear over time; a lift block can restore proper ride height without requiring new springs or shocks.

It's worth noting that lift blocks are designed specifically for leaf-spring rear suspensions. They are not a substitute for a full suspension lift when meaningful increases in ground clearance are the goal, but as a complementary or fine-tuning component, they're hard to beat for simplicity and cost-effectiveness.

Key Considerations When Shopping Suspension Body Blocks

• Material: Look for blocks machined from billet aluminum or high-strength steel — these resist deformation under load far better than cast or stamped alternatives.
• Lift Height: Most blocks are available in 1" to 3" increments. Match the block height to your front lift to achieve a balanced, level stance.
• U-Bolt Compatibility: Always verify that U-bolts are included or specified for your axle diameter — improperly sized U-bolts are a common installation pitfall.
• Vehicle-Specific Fit: Taper angle and locating pin size vary by application. A block engineered for your specific truck ensures proper axle alignment and prevents pinion angle issues.

Top Brands in Suspension Body Blocks

Eibach leads this category with their precision-engineered PRO-TRUCK Lift Block system. Machined from anodized 6061-T6 billet aluminum and designed to integrate seamlessly with Eibach's PRO-TRUCK-LIFT and PRO-TRUCK Coilover systems, these blocks are available in 1" and 1.5" lift heights and backed by a 5-year warranty — a level of craftsmanship and coverage that sets them apart from the competition.

Skyjacker Suspension has been engineering off-road suspension systems since 1974, and their lift blocks reflect that decades-long commitment to field-tested durability. Designed to work within Skyjacker's broader suspension ecosystem, their blocks help deliver the balanced ride height and ground clearance the brand is known for — without sacrificing everyday drivability.

Fabtech is a well-regarded name in the truck lift world, known for comprehensive lift kits that often bundle rear blocks alongside springs, shocks, and control arms. For builders who want all their components to come from a single, trusted source, Fabtech's integrated approach makes lift blocks a natural part of a complete suspension upgrade.

Pro Comp rounds out the category with a broad selection of lift block kits covering a wide range of truck and SUV applications. Pro Comp is a go-to for enthusiasts who need solid, dependable components across both 2WD and 4WD platforms at an accessible price point.