Racing legend Scott Pruett, IMSA president John Doonan, Engineer Bill Riley, and reporter Marshall Pruett dive into the history of the Ford Mustang GTP car which debuted at Road America. #IMSA #autoracing #motorsport #sportscars FOLLOW IMSA: International Motor Sports Association YouTube: @imsaofficial Facebook: @IMSA Instagram: @imsa_racing TikTok: @imsa_racing X/Twitter: @IMSA Download the Official IMSA App for real-time results, timing & scoring. IMSA.com - Sports car racing and radio coverage, schedules, results and stories.