Quote:
Originally Posted by ZMan8
That's Because otherwise the z would win too much...can't have that happen now ... 
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Remember the mustang and Camaro are penalized heavily with weight and power restrictions. They also have to run same size tires as the Z at much higher weight. Organizers have been equalizing all the cars. These restrictions aren't well published to general public.
Also the motors in 370s that run GS are more than HR headed VQ motors typically. They have very expensive engine management systems, racing brake systems, racing cooling systems, suspension upgrades, rear dif and LSD upgrades, oiling upgrades, etc. yep pretty much completely rebuilt car. Don't forget Doran started with a $150k racing car version of 370z and still had to make major mods to be competitive.