Borla(r) Hanger/ Isolator Kit is designed for use with custom installations. They can be welded to any muffler neck, Borla(r) Pipe Bracket Kit, or Borla(r) CrateMuffler Bracket Kit to create a clean, custom look. Kit contains (4) 5/16" diameter and (2) 7/16" 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.