Bspec Nurburgring 4hr

[SaubermercC11]

Hi everyone . I'm wanting to compete the 4hr nurburgring B spec so then I can compete the whole game and move on to GT6 . I want to do it realistic so I don't now wether to use :

GT By Citroen ( Race Car )
Ford GT Spec ii
Ford GT40
Toyota 7 ?

Any other suguests ?