1/2" steel lasered/machined hub and caliper spacers to make lower balljoint clearance on 99-16 GM fullsize trucks running 16" brakes with flipped lower balljoints (common to aftermarket control arms).  

Use with longer bolts Class 10.9 M14-1.5 x 80 such as Fastenal 11114031

It is highly recommended to TIG weld the spacers to the spindle using 312 filler rod, so as to reduce pressure on the hub bolts, as is the factory situation.