PORSCHE RACING HISTORY1964 - Sebring 12 Hours
21 March 1964 - Sebring International Raceway, USA
The first international success for the Porsche 904 GTS, Lake Underwood and Briggs Cunningham win class P3.0 whilst the Porsche 356 of Ben Pon and Joe Buzetta win class GT2.0
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 37 | Porsche 904 GTS | 904-018 | P3.0 | Lake Underwood (USA)/Briggs Cunningham (USA) | B. S. Cunningham (USA) | 9th | 1st | 27th | |
| 43 | Porsche 356 B Carrera 2000 GT/GS | 356-122 992 | GT2.0 | Ben Pon (NL)/Joe Buzzetta (USA) | Porsche System Engineering (D) | 11th | 1st | 34th | |
| 45 | Porsche 356 B Carrera Arbath GTL | GT2.0 | Chuck Cassel (USA)/Don Sesslar (USA) | Carl W. Lindell (USA) | 12th | 37th | |||
| 42 | Porsche 356 B Carrera 2000 GT/GS | 356-122 991 | GT2.0 | Don Wester (USA)/Bruce Jennings (USA) | Porsche System Engineering (D) | 19th | 35th | ||
| 41 | Porsche 718 RS | 718-047 | P3.0 | Edgar Barth (DDR)/Herbert Linge (D) | Porsche System Engineering (D) | 20th | 14th | ||
| 39 | Porsche 904 GTS | 904-043 | P3.0 | Jack Ryan (USA)/Bill Bencker (USA) | John E Ryan (USA) | 31st | 26th | DNF Accident | |
| 36 | Porsche 904 GTS | 904-011 | P3.0 | Richie Ginther (USA)/Ronnie Bucknum (USA) | Precision Motor Cars (USA) | 37th | 17th | ||
| 44 | Porsche 356 B Carrera Arbath GTL | GT2.0 | Victor Merino (PR)/Jorge Torruellas (PR) | Porsche Car Import (USA) | DNF | 42nd | Engine | ||
| 52 | Porsche 356 B Carrera Arbath GTL | GT1.6 | John Bently (USA)/Lyle Witmer (USA) | Kenneth Chambliss (USA) | DNF | 55th | |||
| 38 | Porsche 904 GTS | 904-019 | P3.0 | Carel Godin de Beaufort (NL) | Count Godin de Beaufort (NL) | DNF | 65th | Throttle Linkage | |
| 40 | Porsche 904 GTS | P3.0 | Hap Sharp (USA)/Ronnie Hissom (USA) | Hap Sharp (USA) | DNF | 31st | Gearbox |
World Sports Car Championship Sebring 12 Hours
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