Borla Hanger Isolator Kit is designed for use with custom installations. They can be welded to any muffler neck, Borla Pipe Bracket Kit, or Borla CrateMuffler Bracket Kit to create a clean, custom look. Kit contains (4) 516 diameter and (2) 716 diameter stainless steel rods, and (2) high - temperature rubber isolators. Natural mill finish can be brushed or polished prior to installation. To see how to use these hangers check out the How to Install Video Link.