PORSCHE RACING HISTORYChassis No. 303 474
1 April 1967 - Sebring 12 Hours - International Manufacturers Championship : Prototypes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 41 | Porsche 911 S | 303 474 | GT2.0 | Sepp Greger (D)/Günter Besier (D) | Sepp Greger (D) | 20th | 4th | 35th | 181 laps |
23 March 1968 - Sebring 12 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 63 | Porsche 911 S | 303 474 | GT2.0 | Sepp Greger (D)/Malte Huth (D) | Sepp Greger (D) | DNF | 46th | 46 laps - Piston |