PORSCHE RACING HISTORYKenper Miller (USA)
1981
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 40 | Porsche 935 J | 930 890 0012 | IMSA GTX | Mauricio DeNarváez (COL)/Kenper Miller (USA)/Günther Steckkönig (D) | Joest Racing (D) | DNF | 25th | 152 laps - Fire |
12 July 1981 - Watkins Glen 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720008 | GTO | Paul Miller (USA)/Kenper Miller (USA) | Herman and Miller Porsche-Audi (USA) | DNF | 21st | 4 laps - Head Gasket |