This box kit includes precision-engineered subframes that serve as structural components in a suspension lift system. These subframes are designed to maintain proper suspension geometry, alignment, and durability when lifting the vehicle. Constructed from high-strength steel, they provide a stable mounting foundation for other lift components and help distribute loads evenly across the chassis. The subframes are finished with a corrosion-resistant coating to ensure long-term performance in both on-road and off-road conditions.