1969 Chevrolet Corvette by Detroit Speed Posted on September 26, 2019 by Mavidea SPECS Builder: Detroit Speed Transmission: Bowler Tremec T-56 Magnum Suspension: Detroit Speed and Engineering Check out Bob Gawlik’s beautiful 1969 Chevrolet Corvette, built by Detroit Speed and boasting a fantastic Bowler-built Tremec T-56 Magnum!