The number of silver arrows on the grid in PWC is growing.
New rules in GTS class has it running separate races from GT.
The PWC is quickly becoming a premier sports car racing league in North America.
The 2014 TUDOR United SportsCar GTD champions are making the transition into PWC.
Starting in 2015, the class will integrate the introduction of the Porsche 991 Cup Cars.
Scuderia Corsa made a one-off start at Sonoma and apparently, they liked what they saw.
K-PAX Racing driver Robert Thorne closed out the final round of the season with his first win.
First Pirelli World Challenge championships for all three.
Thorne and Baldwin win the battle, O'Connell and Aschenbach win the war.
The race today was Round 15 of the 2014 Pirelli World Challenge GTS season...
Mills, Esayian, Poland, Johnsson and Price also take victories.
Through the ups and downs, TRG-AMR was able to learn more than ever anticipated.
Final roster of major events at the Utah speedway for the season.
Andy Lee will make his PWC GT debut at Miller Motorsports Park this weekend.
One weekend remains in the PWC season.
A pair of first-time winners on the podium.
Integrates the Porsche 991 Cup models.
Three classes running two 40-minute sprints.
Guy Smith sets track record as Butch Leitzinger wins move of the race award.
Plenty of contact makes race a survival contest.
Round 14 takes place this aftenoon.
Guy Smith sets fastest lap time and achieves pole position for Race #2 at Sonoma
Bentley Boy Guy Smith to pilot second Bentley; joins Butch Leitzinger.
O'Connell still in control of the GT points.
Ron Yarab impresses in first event with the team.
The field raced under a green flag for only 13 laps before the skies opened and it began to rain.
Contact after a restart and resulting pit stop proves costly.
Pirelli World Challenge winners on Saturday repeat in second round.