Lavon Miller Successfully Defends Ultimate Callout Challenge Crown Following the success of the inaugural Ultimate Callout Challenge (UCC) in Salt Lake City last year, the second-annual event brought 31 turbodiesel truck builders to Indianapolis for another noholds-barred competition measuring horsepower and torque, quarter-mile times and sled-pull performances. Defending UCC champion and AMSOIL-sponsored diesel builder Lavon […]
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