BEL6432 / 6432 - Application Notes Belltech 7" Flip Kit for your F-Series 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 and spring plates, and all are protected 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 I-Beams and springs, for the ultimate drop.