13. I used the factory ZJ brake line on the rear axle after drilling out the banjo holes to fit the new JK banjo bolts. I had to slightly trim (arrow) 1/4 inch of material off the two ridges of metal on the caliper to accept the ZJ brake lines. To hold the line in place on the driver side of the axle I drilled a hole in the track-bar mount and tacked on a nut. I also welded a nut on the lower spring mount of the passenger side. I replaced the front brake lines with extended JK lines.