The HD shackle is made heavier and uses a larger shackle bolt so be sure to let us know if you are also ordering the greasable shackle bolts. Sold individually.
51-21010 BC Leaf Spring Stock no lift for Early Bronco
51-22020 BC Leaf Spring 2.5 for Early Bronco
51-23020 BC Leaf Spring 3.5 for Early Bronco
51-24020 BC Leaf Spring 4.5 for Early Bronco