Great tune GR65, but lose the 90kg ballast as it doesn't need it. Without the ballast and running 648pp it was 3 seconds faster at Mt Panorama.
Turns in well, stops well, very little understeer and no oversteer. Doesn't need traction control or any other aids if you have a steering wheel. Almost as fast as a Raybrig HSV at Mt Panorama, and just as easy to drive hard.
I like it GR65, great job.