Chevy Sonic Engineer John Buttermore Repeats SCCA National Championship

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Back in May we told you about John Buttermore, the Lead Development Engineer on the Chevy Sonic program who also just happens to be the defending SCCA Touring 1 National Champion. Now make that the 2 ?time defending National Champion. Buttermore recently piloted his Corvette to his 2nd consecutive Touring 1 National Championship during the