The AMLS and the GT1 do this well by restrictions and weight. The Nissan GTR runs a N/A 5.6litre V8 with 18" tyres and sequential gearbox. So not all that strange.
WRC are offering the GT class, which is just for the tarmac stages for 2wd cars like this N/A 1200kg Exige V6.



Like a modern day Metro 6R4. They also have GT racers and drink tigers blood



















