Ford Mustang GT V6 Front O2 Sensor Extensions FEATURES: Required When Installing Long Tube Headers Front Extensions for 6-pin Connector High Quality Sealed Connectors Sold in Pairs VEHICLE FITMENT: 2015-2017 Ford Mustang GT 5.0L & 3.7L V6 (Front Only) Complete Your Header Installation BBK O2 Wire Harness Extenders are a must when installing full length headers on your 2015-2017 Ford Mustang 5.0L or 3.7L due to the fact that the O2 sensor locations are relocated on full length headers. So rather than cutting into your factory wire harness to make the connections reach, simply plug in a set of BBK extensions and make all the connections look factory with no mess. Easy Installation OEM connectors and heat protective sleeves make installation a snap. Simply transfer your factory oxygen sensors to the new location in the collector and click these into place on the OEM harness. Locator Tabs Some connectors may require the small directional location tabs to be removed from the ends of the connectors to click into place.