This ISR Performance harness extension is a perfect fit for 2003 - 2004 Nissan 350Z and Infiniti G35 with VQ35DE engines. It's designed for 4 - wire O2 sensors. Made with OEM Housings, Locks, Wire Seals, Terminals, and MIL Spec M22759/32 Tefzel wire, it's high - quality. When you install long tube headers on your 350z, there's no need to cut or splice the O2 sensor wires. It's a direct plug - and - play solution. But remember, it only works with early model VQ35DE 4 - wire O2 sensors, not the later 6 - wire ones. Also, it's only legal in California for racing vehicles not used on public highways.
Using this harness extension is easy. When you're installing long tube headers on your 2003 - 2004 Nissan 350Z or Infiniti G35 with VQ35DE engine, just plug it in directly. No need to cut or splice the O2 sensor wires. Before ordering, check that you have the early model VQ35DE 4 - wire O2 sensors. This product won't work with later model 6 - wire O2 sensors. As for maintenance, keep it clean and check the connections regularly. And remember, it's only legal for racing vehicles in California that won't be used on public highways.
