Do you need a longer harness? AutoMeter wideband extension harnesses help with your longer runs. If you're wiring a mid or rear engine vehicle, an 8 ft. harness is not going to get you where you need to go. AutoMeter wideband extension harnesses offer 25 ft. of length to get your air/fuel ratio gauges wired properly. AutoMeter extension harnesses are available in two models for your PRO Series and Street or analog wideband AFR gauges.