1987-2009 Mustang O2 Oxygen 18" Extension Wires w/Plug Harness Will fit ANY 1987-2009 Mustang, Cobra or Shelby. The connectors are all the same. Sold in Pairs (LH &amp; RH); 18" in length Will work on most 1986's, some 86's have a different aligning pin inside of the plugs Comes with the correct plugs for an easy "plug &amp; play" installation. These are commonly required when changing headers and exhaust.