Colin Braun set the pace in the second and final Pirelli World Challenge GTS practice session at Lime Rock Park on Saturday morning.
The GMG Racing driver posted a best time of 55.032 early in the 45-minute session in the No. 04 Audi R8 LMS GT4.
Co-driver George Kurtz then took over the controls for the remainder of the session.
Kyle Marcelli was the second quickest driver, lapping just 0.129 seconds slower in the No. 13 Porsche Cayman GT4 Clubsport MR run by Pfaff Motorsports, after going fastest in Friday’s opening practice.
The No. 17 Classic BMW-run M4 GT4 was third, ahead of the MarcoPolo Motorsports KTM X-Bow GT4.
The top 12 cars were classified within 0.5 seconds with a total of 21 cars within one second of the fastest time.
The session ended with the No. 10 PF Racing Ford Mustang GT4 in the barriers, with JR Pesek at the wheel.
GTS qualifying will take place at 2:25 p.m. EDT.
RESULTS: Practice 2