BEL4010 / 4010 - Application Notes Belltech 3" Dropped I-Beams are engineered for Fords with the same criteria as our Dropped Spindles. Belltech's fully welded boxed beam design provides increased strength at critical load bearing points while improving handling and steering response. These direct replacement I-Beams are protected with a high quality powder coated finish and include urethane coil spring mounts and bushings.