ok i rang for a price on the OZA395-E2
5x OZA395-E2 = $68.15inc
i also found out some new information that people may not of been aware of
Zirconia are made by Bosch
Titania are made by Siemens
now when the R32 GTR was built Nissan might of had a deal with Siemens for them to supply all there O2 sensors and when it came to the R33 they MAY have changed to BOSCH contract which would make sense as RB25 have zirconia why wouldn't RB26
the aforementioned statement are purely thoughts of my own and are not based upon anything ive read
my source tells me there is an easy check to see if your running Titania or Zirconia
unplug you O2 sensor and start your car measure the signal wire with multimeter and...
Zirconia should give a reading .3-.4 volts
Titania should give a reading of 3-5volts