BBK 11181 O2 Sensor Extensions 4 Pin Rear 24" Pair for 05-23 Dodge 6.1 6.2 6.4LFeatures OEM connectors and heat protective sleeves are used to make installation a snap. Simply transfer your factory oxygen sensors to the new O2 sensor location in the collectors and click these into place on the OEM harness. When you install a set of BBK Performance long tube exhaust headers on your muscle car or truck, the O2 sensor locations are relocated on the BBK header and mid pipe. The factory O2 sensor wire connectors will not be long