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that looks like the GM proving grounds up in Michigan. I am originally from Michigan and GM has a huge proving grounds there. Its like 16 Sq. miles. you can drive around the perimitar of it on the public roads and in a few areas you can get a view of the raods. There have some banked turns there for high speed runs.
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2001 ecsb 5.3- OBX long tube headers, volant CAI, 80MM TB,TB bypass, Nelson tune, LS1 Fans
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