I apologise for keep resurrecting this thread ...
Received my O2 sensor yesterday morning, fitment was perfect and went on like stock, After fitting it i took her out for a spin and within seconds ( she was warm already) i realised the low end acceleration was far more responsive and "alive" .. car seems to run alot smoother aswell.
I would recommend if your in doubt.. do it ! You wont be dissapointed, i was actually shocked with how it almost transformed the acceleration. Ive had my sup 2 years and done around 18k miles and havent changed the o2 sensor until now.God knows how long it had been since it was changed.
I know its not really supposed to do anything performance wise but this seems to have made my sup far more responsive, let the fuel saving commence !!
Thanks to the OP for the threads and info on doing this.