| 2.2.1975 | 24 h Daytona | 4 | #911 460 0037 | Webbe / Dickinson / Theodoracopulos | Bill Webbe | 5th |
| 2.2.1975 | 24 h Daytona | 5 | #911 460 9041 | Rojas / Rebaque / van Beuren, Jr. | Hector Rebaque | 9th |
| 2.2.1975 | 24 h Daytona | 9 | #911 360 0610 | Bolanos / Heyer / Jourdain | Juan Carlos Bolanos | 39th |
| 2.2.1975 | 24 h Daytona | 11 | #911 460 9049 | Keyser / Sprowls / Contreras | Toad Hall | 2nd |
| 2.2.1975 | 24 h Daytona | 14 | #005 0009 | Holbert / Forbes-Robinson | Porsche-Audi USA | 8th |
| 2.2.1975 | 24 h Daytona | 23 | #911 360 0727 | Kemp / Baird | Armor All | 3rd |
| 2.2.1975 | 24 h Daytona | 30 | #911 460 9048 | Bienvenue / Dyer | George Dyer | 4th |
| 2.2.1975 | 24 h Daytona | 59 | #911 460 9054 | Gregg / Haywood | Brumos Porsche | 1st |
| 2.2.1975 | 24 h Daytona | 67 | #911 360 0701 | McClain / White | David McClain | 15th |
| 21.3.1975 | 12 h Sebring | 1 | #911 460 9049 | Keyser / Sprowls / Contreras | Toad Hall Racing | 13th |
| 21.3.1975 | 12 h Sebring | 4 | #911 460 0037 | Dickinson / Webbe / Theodoracopulos | George Dickinson | 5th |
| 21.3.1975 | 12 h Sebring | 14 | #005 0009 | Holbert / Forbes-Robinson | Holbert's Porsche-Audi | 12th |
| 21.3.1975 | 12 h Sebring | 30 | #911 460 9048 | Dyer / Bienvenue | George Dyer | 2nd |
| 21.3.1975 | 12 h Sebring | 59 | #911 460 9054 | Gregg / Haywood | Brumos Porsche-Audi | 53rd |
| 21.3.1975 | 12 h Sebring | 91 | #911 360 0610 | Bolanos / Jourdain / Bolanos | Bolanos Racing | 4th |
| 23.3.1975 | 1000 km Mugello | 44 | #911 460 9040 | Schurti / Hezemans / Fitzpatrick | Gelo Racing Team | 9th |
| 23.3.1975 | 1000 km Mugello | 52 | #911 460 9067 | Schickentanz / Bertrams / Wisell | Tebernum Porsche Racing | 10th |
| 23.3.1975 | 1000 km Mugello | 54 | #911 460 9052 | Haldi / Béring | Porsche Club Romand | DNF |
| 23.3.1975 | 1000 km Mugello | 57 | #004 0010 | Bonomelli / Rulon-Miller | Ennio Bonomelli | DNA |
| 23.3.1975 | DARM Zolder [GT] | 346 | #911 230 0818 | Hans Forster | Hans Forster | DNA |
| 23.3.1975 | DARM Zolder [GT] | 348 | #004 0005 | Hans Halfmann | Rallye-Club Rheinhausen | 7th |
| 30.3.1975 | Nürburgring [GT/T] | | #005 0005 | Helmut Kelleners | Jägermeister-Kremer-Team | 3rd |
| 30.3.1975 | Nürburgring [GT/T] | | | Toine Hezemans | GELO-Racing-Team | 4th |
| 30.3.1975 | Nürburgring [GT/T] | | #911 460 9067 | Clemens Schickentanz | Tebernum-Porsche-Racing-Team | 5th |
| 30.3.1975 | Nürburgring [GT/T] | | | John Fitzpatrick | GELO-Racing-Team | 14th |
| 30.3.1975 | Nürburgring [GT/T] | | | Josef Brambring | Josef Brambring | 8th |
| 31.3.1975 | NTK Zandvoort | 64 | #005 0004 | Cees Siewertsen | Wallys Jeans | 1st |
| 31.3.1975 | Nürburgring Goodyear Pokal | | | Toine Hezemans | GELO-Racing-Team | 4th |
| 31.3.1975 | Nürburgring Goodyear Pokal | | #005 0005 | Helmut Kelleners | Jägermeister-Kremer-Team | 6th |
| 31.3.1975 | Nürburgring Goodyear Pokal | | | Josef Brambring | Kremer | 8th |
| 31.3.1975 | Nürburgring Goodyear Pokal | | #911 460 9067 | Clemens Schickentanz | Tebernum-Porsche-Racing-Team | 3rd |
| 31.3.1975 | Nürburgring Goodyear Pokal | | | John Fitzpatrick | GELO-Racing-Team | 5th |
| 6.4.1975 | 800 km Dijon | 25 | | Godard / Rulon-Miller | Gante Racing | 11th |
| 6.4.1975 | 800 km Dijon | 26 | #911 460 9051 | Ballot-Léna / Wollek | Robert Buchet | 8th |
| 6.4.1975 | 800 km Dijon | 28 | #911 460 9058 | Vollery / Dorchy | William Vollery | DNQ |
| 6.4.1975 | 800 km Dijon | 29 | #911 460 9052 | Haldi / Béring / Dorchy | Porsche Club Romand | DNF |
| 6.4.1975 | 800 km Dijon | 33 | #911 460 9040 | Fitzpatrick / Hezemans | Gelo Racing Team | 5th |
| 13.4.1975 | Euro GT Imola | 48 | | John Fitzpatrick | Gelo Racing Team Georg Loos | DQ |
| 13.4.1975 | Euro GT Imola | 51 | #911 460 9067 | Clemens Schickentanz | Tebernum Porsche | DQ |
| 13.4.1975 | Interserie Hockenheim | 53 | #005 0005 | Helmut Kelleners | Porsche Kremer Racing | DNA |
| 13.4.1975 | Interserie Hockenheim | 54 | #005 0004 | Cees Siewertsen | Porsche Kremer Racing | DNA |
| 13.4.1975 | DARM Hockenheim [GT+2.0/T+2.0] | 54? | #005 0004 | Cees Siewertsen | Kremer-Team | 4th |
| 13.4.1975 | Euro GT Imola | 54 | #911 460 9058 | William Vollery | | 3rd |
| 13.4.1975 | Euro GT Imola | | #911 460 9052 | Claude Haldi | Porsche Club Romand | 1st |
| 13.4.1975 | Euro GT Imola | | #911 460 9051 | Claude Ballot-Léna | Ecurie Robert Buchet | 2nd |
| 13.4.1975 | Euro GT Imola | | #911 460 9110 | Girolamo Capra | | 8th |
| 13.4.1975 | DARM Hockenheim [GT+2.0/T+2.0] | | | Josef Brambring | Josef Brambring | 5th |
| 13.4.1975 | DARM Hockenheim [GT+2.0/T+2.0] | | #005 0005 | Helmut Kelleners | Jägermeister Kremer-Team | 3rd |
| 13.4.1975 | DARM Hockenheim [GT+2.0/T+2.0] | | #911 230 0818 | Hans Forster | Hans Forster | ?th |
| 13.4.1975 | DARM Hockenheim [GT+2.0/T+2.0] | | #004 0005 | Hans Halfmann | Tebernum-Porsche-Racing-Team | ?th |
| 20.4.1975 | 100 mile Road Atlanta II | 1 | #911 460 9049 | Michael Keyser | Toad Hall Racing | 3rd |
| 20.4.1975 | 100 mile Road Atlanta I | 1 | #911 460 9049 | Michael Keyser | Toad Hall Racing | 5th |
| 20.4.1975 | 100 mile Road Atlanta II | 9 | #911 360 0610 | Juan Carlos Bolanos | | 27th |
| 20.4.1975 | 100 mile Road Atlanta I | 9 | #911 360 0610 | Juan Carlos Bolanos | | 9th |
| 20.4.1975 | 100 mile Road Atlanta I | 14 | #005 0009 | Al Holbert | | 2nd |
| 20.4.1975 | 100 mile Road Atlanta II | 14 | #005 0009 | Al Holbert | | 1st |
| 20.4.1975 | 100 mile Road Atlanta II | 30 | #911 460 9048 | George Dyer | George Dyer | 25th |
| 20.4.1975 | 100 mile Road Atlanta I | 30 | #911 460 9048 | George Dyer | George Dyer | 6th |
| 20.4.1975 | 100 mile Road Atlanta II | 59 | | Peter Gregg | | 4th |
| 20.4.1975 | 100 mile Road Atlanta I | 59 | | Peter Gregg | | 1st |
| 20.4.1975 | NTK Zandvoort | 64 | #005 0004 | Cees Siewertsen | Wallys Jeans | DNF |
| 20.4.1975 | 1000 km Monza | 72 | #911 460 9110 | Capra / Lepri | Girolama Capra | DNQ |
| 20.4.1975 | 1000 km Monza | 74 | #911 460 9052 | Haldi / Béguin | Porsche Club Romand | DNF |
| 20.4.1975 | 1000 km Monza | 76 | #005 0005 | Heyer / Kelleners | Jägermeister Kremer Racing | DNF |
| 20.4.1975 | 1000 km Monza | 77 | #911 460 9040 | Hezemans / Schurti / Fitzpatrick | Gelo Racing Team | 6th |
| 20.4.1975 | 1000 km Monza | 79 | #911 460 9067 | Wisell / Schickentanz / Bertrams | Tebernum Porsche Racing Team | DNF |
| 20.4.1975 | 1000 km Monza | 82 | #911 460 9058 | Vollery / Dorchy | Ecurie du Nord | DNQ |
| 20.4.1975 | 1000 km Monza | 83 | #004 0010 | Bonomelli / Rulon-Miller | Gante Racing | DNQ |
| 20.4.1975 | 100 mile Road Atlanta II | 95 | #911 460 9057 | Bob Hagestad | Bob Hagestad | 7th |
| 20.4.1975 | 100 mile Road Atlanta I | 95 | #911 460 9057 | Bob Hagestad | Bob Hagestad | 7th |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 1 | #911 460 9052 | Claude Haldi | Porsche Club Romand | ?th |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 2 | #911 460 9058 | William Vollery | Porsche Club Romand | DNA |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 3 | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 6th |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 8 | #911 460 9067 | Clemens Schickentanz | Tebernum-Porsche Racing-Team | 2nd |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 19 | | Josef Brambring | Josef Brambring | 12th |
| 27.4.1975 | DRM Nürburgring Eifelrennen | 36 | | John Fitzpatrick | GELO-Racing-Team | DNF |
| 4.5.1975 | 100 mile Laguna Seca I | 1 | #911 460 9049 | Michael Keyser | | 4th |
| 4.5.1975 | 100 mile Laguna Seca I | 30 | #911 460 9048 | George Dyer | George Dyer | 5th |
| 4.5.1975 | 100 mile Laguna Seca I | 59 | | Peter Gregg | | 1st |
| 4.5.1975 | 100 mile Laguna Seca II | 61 | #911 560 9122 | Jim Busby | | 8th |
| 4.5.1975 | 100 mile Laguna Seca I | 61 | #911 560 9122 | Jim Busby | | 9th |
| 4.5.1975 | 100 mile Laguna Seca II | 95 | #911 460 9057 | Bob Hagestad | | 24th |
| 4.5.1975 | 100 mile Laguna Seca I | 95 | #911 460 9057 | Bob Hagestad | | 10th |
| 4.5.1975 | DARM Sembach [GT] | | #004 0005 | Hans Halfmann | Tebernum-Porsche-Racing-Team | 6th |
| 4.5.1975 | DARM Sembach [GT] | | #911 460 9053 | Edi Kofel | | 2nd |
| 1975 | CI Gr.4 Mugello | | #911 460 9110 | Capra | | ?th |
| 1975 | CI Gr.4 Pergusa | | #911 460 9110 | Capra | | ?th |