Chevrolet showed up to our State of American Performance track test with its biggest hammer: the Corvette ZR1X with all the go-fast trimmings. That means the full name is something like ZR1X 3LZ ZTK ...
The 1,250-hp Czinger 21C set a new production car lap record at Chuckwalla, beating the Porsche 911 GT3 RS’ previous best ...
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