GTP and GT classes will see an additional variable added into the equation meant to even out the performance playing field.

While Field’s last start in IMSA-sanctioned competition came in 2011 with his own team, the Ohio native made a racing comeback in Radical Cup North America and also took part in last year’s HSR ...

One of the more unique-looking Jaguar racers, the IMSA-based XJR-10 ... although they were unable to beat the overwhelming Nissan GTP ZX-Turbo cars driven by Geoff Brabham for a championship ...

In GTDX, Adelson’s No. 24 Wright Motorsports Porsche 911 GT3 R was again the class of the field. After winning by more than ...