These progressive springs are 9 or 10 leaf units that feature high grade made in the China steel. The higher spring count allows the use of thinner leaf material which yields a more flexible and progressive leaf stack, producing a smoother and more flexible ride. These springs feature diamond cut inner leaf ends, anti-friction pads and a military wrapped spring eyes for superior durability and the use of oem bushings. These springs combined with a high performance shock will make the ride unbeliveable