In 1990, Norm's brother Tommy Miller became Interstate Battery's President and CEO while Norm remained Chairman of the Board. As a result, Interstate Battery became heavily involved in NASCAR. Interstate Battery became title sponsor of coach Joe Gibbs' new Winston Cup team in 1992 which eventually won the Winston Cup Championship in 2000. In March 2004, Carlos Sepulveda became President & CEO and went on to lead the company for almost a decade until leaving in 2013 to join Triumph Bancorp Group.