Fitment Information Dodge Charger V8 (2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014,  2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024) Dodge Challenger V8 (2008, 2009, 2010, 2011, 2012, 2013, 2014,  2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024) Specs & Features Front 12 inches These are 4 pin connectors 12" length recommended for the Front O2 Harness to extend the length for easy install on Hemi long tube headers. Use These 12" Harness extensions When Installing The BBK RAM 1500 Truck Long Tubes and Mid Pipe - 1950 series (Only required for rear mid pipe - same 4 pin connector Front or rear only difference is the length) Front O2 Harness 12" Extensions OEM Style Connectors Clip Into Place Top Quality Sealed Connectors Sold in Pairs Rear 24 inches These are 4 pin connectors 24" length recommended for the Rear O2 Harness to extend the length for easy install on Hemi long tube headers. Required When Installing Long Tube Headers Top Quality Sealed Connectors Sold in Pairs  Product Description Simplifies Header InstallationThese BBK O2 Wire Harness Extenders are a must when installing full length headers on your 2005-2024 Dodge or Chrysler V8 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 InstallationOEM 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. Locator TabsSome connectors may require the small directional location tabs to be removed from the ends of the connectors to click into place.