I was reading the latest GRM (the one with the new MX5 on the cover) and in the NASA race report there was a mention of a "Spec Mustang" class based on the '05-'10 cars. Only allowed modification being a Ford Racing suspension kit. I was unable to find anything on the NASA website about it. Anyone else heard of this? Sounds interesting.
Sounds like "Spec Iron" it seems to be an up and coming class here in S. East.
This should tell you what you want to know.
http://www.nasaponycars.com
Spec Mustang is also a class in SCCA. At least it is here in SFR - http://scca.cdn.racersites.com/prod/assets/SMGRules8-5-13.pdf
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