PORSCHE RACING HISTORYAl Holbert (USA)
b. 11 November 1946 (Abington, Pennsylvania, USA) - d. 30 September 1988 (Columbus, Ohio, USA)
Wikipedia
Alvah Robert "Al" Holbert
1973 1975 1976 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 19881973
4 February 1973 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 89 | Porsche 911 S | GT+2.0 | Mike Tillson (USA)/Al Holbert (USA)/Dieter Oest (USA) | Holbert Porsche (USA) | DNF | 42nd | 213 laps |
21 July 1973 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 911 Carrera RSR | 911 360 0307 R3 | GT | Al Holbert (USA)/John McComb (USA) | Holbert's Porsche-Audi (USA) | DNF | 19th | 140 laps - Suspension |