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03 To get things rolling, Redline Motorsports dyno tests the showroom-stock GS. The results—425 hp and 401 lb-ft at the rear wheels—reveal this Vette may have left the assembly line with more power than GM advertised. “Typically our dyno reports 390 to 408 rwhp on the [’12] Grand Sports, so the 425hp peak is quite a surprise,” says Redline owner Howard Tanner. View Related Article
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