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.