Reigning Red Bull Global Rallycross champion Scott Speed finished the opening practice session of the 2017 season top of the charts, heading home Steve Arpin and team mate Tanner Foust.
Subaru‘s Chris Atkinson was the early pace setter before the Volkswagen Andretti Rallycross duo of Speed and Foust jumped to the fore.
The VARX pair, who dominated last season them moved to the top and dominated the latter part of the session until Arpin set a quick time late in the session to move him into second, splitting the Beetle drivers.
Atkinson ended the session fourth fastest, ahead of team mate Patrik Sandell who completed the top five.
Next up was Sebastian Eriksson who was sixth fastest, ahead of Olsbergs Honda team mate Mitchell DeJong.
2016 and 2015 Red Bull GRC Lites champions Cabot Bigham and Oliver Eriksson were next up in eighth and ninth, with Austin Dyne completing the field.
In GRC Lites, Colin Braun topped opening practice, ahead of Christian Brooks and reigning RX Lites Cup champion Cyril Raymond.