ICON Vehicle Dynamics Suspension Leaf Spring Block Kit

ICON Vehicle Dynamics Suspension Leaf Spring Block Kits

ICON Vehicle Dynamics has built its reputation on one guiding principle: every suspension component should deliver measurable, real-world performance gains. That philosophy extends all the way down to the foundational elements of a rear suspension system — including their Suspension Leaf Spring Block Kits. While lift blocks may seem like a simple solution, ICON treats them with the same engineering rigor applied to their coilovers and shock absorbers.

What Are Leaf Spring Block Kits and Why Do They Matter?

Leaf spring block kits are spacers inserted between a truck's rear axle and its leaf springs to raise ride height. They are a cost-effective and straightforward way to level a truck's stance, accommodate larger tires, or restore sagging rear suspension. However, not all lift blocks are created equal — material quality, block geometry, and included hardware all affect how the lift performs over time and under load.

ICON's lift block kits include a pair of high-quality cast-iron lift blocks, providing a simple yet cost-efficient solution to increase the rear ride height of a truck. This use of cast iron is an important differentiator: it provides excellent compressive strength and resists deformation under the demanding loads that truck beds and tow hitches regularly impose.

Vehicle-Specific Engineering from a Proven Suspension Brand

In just over a decade, ICON Vehicle Dynamics went from filling a niche to leading the industry in performance off-road suspensions, earning a reputation for technological development and engineering excellence among enthusiasts who demand the highest levels of performance, ruggedness, and versatility. That same discipline applies to even their most straightforward products.

ICON engineers develop vehicle-specific components that maximize wheel travel and ride quality for the best performance possible on and off-road. Their leaf spring block kits are no exception — each kit is designed for specific truck applications, such as the Toyota Tacoma and the GM Colorado, ensuring proper fitment and alignment geometry are maintained after the lift is installed.

For example, ICON's part number 78721 is a 1-inch lift block and U-bolt kit engineered specifically for 2015-and-newer GM Colorado trucks , with a noted incompatibility with the ZR2 trim, demonstrating the application-specific engineering that sets ICON apart from generic lift block solutions.

Part of a Broader, Cohesive Suspension System

Lifting the rear of certain trucks with lift blocks can cause axle wrap — where the axle rotates slightly beneath the leaf springs during acceleration — resulting in loss of traction, vibration, and noise. ICON addresses this by designing their block kits to pair naturally with their broader rear suspension ecosystem. Their Expansion Pack Kits, for instance, are an innovative hybrid of a leaf spring and add-a-leaf, featuring multiple progressively smaller leaves engineered to be added to stock leaf springs to provide lift height while mitigating the axle wrap issues that can accompany standalone block lifts.

All metal forming, laser cutting, CNC machining, assembly, and welding at ICON are performed in the USA , underpinning the quality and consistency customers can expect from every component — including block kits. Whether you are leveling a daily driver or building a weekend trail rig, ICON's leaf spring block kits offer a reliable, brand-backed starting point for your rear suspension upgrade.