GM 4x4 Conversion Hi-Lift Knuckles

Description: These are our GM Hi-Lift Knuckles for Chevy Express and GMC Savana full-size vans. These knuckles are several inches taller than the conventional GM Van spindles and are designed to work with our suite of products for the 5/6" lifted G-Series Vans.  Function:  Maintaining good geometry on IFS (Independent Front Suspension) vehicles like many modern pickups GM, Toyota, Nissan, etc, is just as important if not more so than on solid axle rigs like Ford and Dodge. Improper geometry can cause premature tire wear as well as bump steer under suspension compression which can lead to loss of control when traction is low.  By using a taller knuckle when lowering the mounting point for the lower control arm (as in our drop carriages), we keep the angles of the upper and lower control arms more parallel leading to reduced impact on camber/caster under suspension compression.  Additionally, the tie-rod mounting location on these knuckles has been designed specifically for the GM van a