This harness extension kit is constructed using OEM Housings, Locks, Wire Seals, and Terminals, as well as MIL Spec M22759/32 Tefzel wire. 

When installing long tube headers into your 350z you will need to extend the primary o2 sensor wires, with this kit you will no longer have to cut/splice your o2 sensor wires, this is a direct plug and play!

***PLEASE INSPECT YOUR HARNESS PRIOR TO ORDERING AND ENSURE YOU HAVE THE EARLY MODEL VQ35DE 4 WIRE O2 SENSORS IN PLACE, THIS WILL NOT WORK WITH LATER MODEL 6 WIRE O2 SENSORS!***

Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways; and also for use in other exempted vehicles.