Built from 1-1/2" X 0.120" 4130N chrom-moly tubing 5" drop, 39" centers, 20" flat. The axle mates to the 35300 Dragster Torsion bar. Mounting brackets are 33020. King pin bosses are heli-arc welded using a special precision fixture to maintain correct king pin angle. King pin bores are reamed after welding. Sold each.