Driving McLaren 720 S GT3 No 61, the ABSSA Motosport team timed 1:31.701 hours to land second in the Pro-Am and seventh in the overall event.
The Thai-Japanese duo crossed the line 1.828 seconds behind Pro-Am winners Yuta Kamimura and Hiroaki Nagai of Japan of ARN Racing (Porsche 911 GT 3 No 8).
The overall title went to South Korean Roelof Bruins and German Manuel Metzger ( Mercedez-AMG GT 3 Number 97) of Solite Indigo Racing.