Airbagit Tow Kit 2008-2012 Ford Super Duty Dual Rear Wheel 4 Link - Manual (Page 3)

7. Install the new 4 link mounts. The 4 link mounts install into the factory leaf spring
hanger as shown.
8. Install a 9/16”-12 x 4 ½” bolt with the included machined steel reducers in the
factory leaf spring mounting hole. Make sure the 4 link mount is straight and square
on the frame. Tighten the bolt to secure the position of the hanger and mark and
drill the 6 mounting holes on the frame
9. Remove the bolt that secures the brake line retaining tabs to the factory leaf spring
mount on the axle
10. Install the upper and lower halves of the axle 4 link mounts. The lower half will fit
snugly against the axle and the upper half will locate in the centering pin of the leaf
spring pad. Install 5/8”-11 x 7” bolts and finger tighten for now