Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-2069	Rear	4,415lbs	3/1

This spring has a 1/2" center bolt. Some SuperDuty pickups originally had a 7/16" center bolt so it may be necessary to either trim the center bolt head or drill out the mounting hole in the axle and/or block to accommodate a slightly larger head

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-2069HD	Rear	5,325lbs	5/1

This is a heavy duty upgrade to the rear spring This spring has a 1/2" center bolt. Some SuperDuty pickups originally had a 7/16" center bolt so it may be necessary to either trim the center bolt head or drill out the mounting hole in the axle and/or block to...