Fits 10.5 & 10.25 Sterling rear axles common in OBS and Ford Super Dutys with an axle tube diameter of 3.5", we also offer an option for the larger tube Dana 80 4". 

Low profile Spring perch designed to help reduce axle wrap.  Perch is 3/4" lower than factory perch.

Three mounting holes for ease of centering wheel in wheel well.

U-Bolt length is measured from inside of U-bolt bend to end of U-bolt.

Kit includes 2 x 3/8" upper spring plates, 4 x 5/8" grade 8 U-bolts with nuts and washers, 2 x 1/4" cut/formed/welded lower spring pads for either a 3.5" or 4" axle tube. 

Parts list: Ford Sterling 10.25/10.5 3.5" axle tube kits. 

• 2 x plate 233304
• 2 x pad 233303
• 4 x U-bolt (9.5-4 x 22516) (12.5-4 x 22519) ( 15.5-7638k)

Parts list: Ford Dana 80 4" axle tube kits.

• 2 x plate 233304
• 2 x pad 231311
• 4 x U-bolt ( 9.5-4 x 22517) (12.5-4 x 22520) (15.5-4 x 22528)