The skyline that I bought has it done thats all.....
Apparently after doing it, it jumped from 160rwkw to 185rwkw, and seemed to go alot better....
It took him 2 months to do, but he changed the whole rocker cover design as well, maybe I am being a little vague with what he did, I will find out more info....
He researched high and low and found that what he has done hasn't been done in Aus before so i will get more details...
Just wanted some other opinions