- 2.5 in.
. 84-96 Bronco;77-96 Ford F-150;73-96 Ford F-250;73-96 Ford F-350;Rear Add-A-Leaf Kit;Long;Dual Leaf;California Residents: WARNING Pro Comp Rear Add-A-Leaf Kit - 13130 This strengthens the integrity of an existing leaf spring pack, which is helpful when trying to renew the spring due to age and heavy loads.5 in.Add-a-Leaf kits are the perfect solution when 1.