Due to the fact that the O2 sensors are relocated on ALL long tube headers including other manufacturers- These extensions are a must when Installing Full Length Headers on Ford Mustang applications - These BBK O2 wire harness extensions feature OEM Factory connectors on the end of the wiring to allow simple plug in installation to the factory wire harness so that the relocation is super simple and does not require any splicing of the factory harness at all. (Sold in Pairs) Factory OEM connectors and heat protective sleeves make installation a snap. These will work on 3 and 4 wire applications - Some Connectors May require the small directional location tabs to be removed on the ends of the connectors to click into place. applications.
