Peter Kox and Mark Wilkins delivered the first Pirelli World Challenge victory for the Acura NSX GT3 in Utah.
Alvaro Parente beat Patrick Long by more nearly seven seconds in Race 2 at Mid-Ohio to sweep the weekend in his K-PAX Racing McLaren.
Ian James passed pole sitter Lawson Aschenbach to take the lead and the victory in Race 2 at Mid-Ohio.
Alvaro Parent stormed to victory after starting from pole in the first of two GT races at Mid-Ohio.
Lawson Aschenbach survived two cautions to take the victory in a disrupted first GTS race at Mid-Ohio.
Ian James swept the weekend at Road America in his Panoz Avezzano GT.
Patrick Long passed Adderly Fong on the opening lap and held on to win GT Race 2 at Road America.
Ian James took his Panoz Avezzano GT to victory lane in the first of two GTS races at Road America.
Adderly Fong held off Patrick Long's last-lap charge to win Race 1 of the Road America doubleheader for GT Sprint.
Current Indy Lights competitor Nico Jamin completed a dominant sweep of the GTS doubleheader at VIR by winning Sunday's Race 2.