BEL6437 / 6437 - Application Notes Belltech 6" Flip Kit for your GM truck relocates the rear axle on top of the leaf spring pack for the lowest drop available. Kits feature heavy duty, contoured C-sections, heliarc welded saddles, spring plates and shock extensions with a high quality powder coated finish. 5/8" U-bolts, high grade hardware and instructions are included. The system is designed to be used with our Dropped Front Spindles and springs for the ultimate drop.