First a z tune is an R34 skyline
You chose to use the top factory spec manaro in you comparison - I was just recpricating with the top spec R34 which seemed fair to me.
Anyone can say they have a youtube video proving their point.
It is worthless without confirmed specs since it could be a non turbo 2 litre 4 door r34 against a racing manaro
Still it would be nice to see this slaughter ???
On the other hand my info isnt a video we have not seen but confirmed independantly recorded track times around the best test track on the planet
The best manaro time ever recorded there does not get near 15 year old stock R33GTR times (of which there are more than a few) . In fact around the ring in it is slower by about half a minute !!!
Look if you prefer the manaro thats absolutely fine by me and you dont need to justify your choice - after all thats what the thread about , but.....
when you talk about track performance please use confirmed facts which is what mine are.