GTO LM gear ratios

[Owlster1YT]

I was wanting to max the GTO LM for gear ratios and I can't seem to find any talking about gear ratio. Now the GTO Twin Turbo is fine but the way I have it, it's better for racing and not really cornering. I feel like a can upgrade the stock speed but I am a simpleton when it comes to gear ratios and whatnot