PORSCHE RACING HISTORYHorst Klauke (D)
1973 : European GT Championship Estoril - 1st in class
1 April 1973 - Nürburgring 300 Km - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 140 | Porsche 911 S | GT2.0 | Horst Klauke (D) | Team Europa-Möbel (D) | DNF |
27 May 1973 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 62 | Porsche 911 S | GT+1.6 | Eckhard Schimpf (D)/Horst Klauke (D)/Franz-Josef Rieder (D) | Team Europa-Möbel (D) | DNF | 50th |
8 July 1973 - European GT Championship Estoril - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 22 | Porsche 911 T | GT2.0 | Horst Klauke (D) | Team Sixtant (D) | 10th | 1st | 11th | 72 laps |
5 August 1973 - Euro GT Thruxton - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 T | GT2.0 | Horst Klauke (D) | DNF | Accident |