Duffy Trophy Awarded to 2020 IKF Sprint GrandNationals Winners Duffy Trophy Awarded to 2020 IKF Sprint GrandNationals Winners Mitchell Koolen / Friday, October 30, 2020 0 2158 Article rating: No rating The International Kart Federation (IKF) held the Sprint GrandNationals presented by RLV for the 2020 season at the Santa Maria Karting Association (SMKA) facility on October 23-25. Read more