If you need to eliminate 1 o2 sensor to run a gen2 exhaust on your gen3, this harness will allow that, takes signal from 1 o2 sensor amd sends it to both left and right hand O2 sensor connectors on your Gen3 Hayabusa.
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Gen3 Hayabusa O2 Sensor Adapter Harness
This harness will allow you to use a Gen2 Exhaust that only has a single O2 sensor. The Gen3 Hayabusa comes stock with (2) O2 sensors.
boostbysmith.com
