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Semclane:
Are you saying that the SCCA commitee told you that an m-performance lsd is allowed in F-Street? If this is the case I am surprise and happy to hear that. Any evidence of this discussion you can share for my local club?
For the question regarding what class square setup would fall in I am running the original square setup that came from the factory front and rear 18x7.5 so they are definately falling under the F-Street class. This is why this summer I will try to go to 17x7.5 and try to run 245/40/17. This should all be legal in Street class and should give me more rubber for less weight and a lower overall gear ratio.
I am still slightly hesitating between 245,235 and 225 on a 7.5 rim. I know wider is usually better but there are different theorie on this and still searching a real test result that would confirm the best pick.
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