BBK 1676 O2 Oxygen Sensor Wire Harness Extensions 1986-2010 Ford 4 pin 18" (Pack of 2) BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built Required when Installing Full Length Long Tube Exhaust Headers and Matching Short Mid Pipes to Allow Easy Connection to Factory O2 Wire Harness Loom O2 Sensors are Usually Relocated on Long Tube or Full Length Headers to Lower Collector Area The Additional Length these Harnesses Provide Allow the O2 Sensors to Simply Plug Back in From the New Location, Designed with OEM Harness Connectors for Simple Installation Trouble Free Installation, Sold in Pairs