PORSCHE RACING HISTORYKees Nierop (CDN)
1986 : Road America 500 Miles - 3rd in class
24 August 1986 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 962 | 962-113 | GTP | Bob Akin (USA)/Kees Nierop (CDN) | Bob Akin Motor Racing (USA) | 6th | 3rd | 16th | 114 laps |
26 October 1986 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 961 | WP0ZZZ93ZFS010016 | GTP | Günther Steckkönig (D)/Kees Nierop (CDN) | Porsche AG (D) | 24th | 11th | 29th | 81 laps |