When you install a set of BBK Performance long tube exhaust headers on your Mustang the O2 sensors are relocated. The header is no longer in the factory location, and the O2 sensors no longer reach. These extension harnesses are a must when installing full-length headers.
All harnesses feature OEM Factory connectors to allow simple plug in installation to the factory wire harness. This makes the relocation super simple, and no splicing of the factory harness will be required. (Sold in Pairs)