| 12.7.1975 | 6 h Watkins Glen | 14 | #005 0009 | Holbert / Gregg | Holbert Porsche-Audi, Inc. | 7th |
| 12.7.1975 | 6 h Watkins Glen | 95 | #911 460 9057 | Hagestad / Haywood | Hagestad Porsche-Audi | 5th |
| 20.7.1975 | 100 mile Mid America I | 1 | #911 460 9049 | Michael Keyser | Toad Hall | 25th |
| 20.7.1975 | 100 mile Mid America II | 1 | #911 460 9049 | Michael Keyser | Toad Hall | 26th |
| 20.7.1975 | 100 mile Mid America II | 14 | #005 0009 | Al Holbert | Holbert's Porsche | 1st |
| 20.7.1975 | 100 mile Mid America I | 14 | #005 0009 | Al Holbert | Holbert's Porsche | 1st |
| 20.7.1975 | 100 mile Mid America II | 30 | #911 460 9048 | George Dyer | Dyer Racing | 23rd |
| 20.7.1975 | 100 mile Mid America I | 30 | #911 460 9048 | George Dyer | Dyer Racing | 4th |
| 20.7.1975 | Targa Florio | 43 | #911 360 0894 | Barraco / Chiaramonte | | DNF |
| 20.7.1975 | Targa Florio | 46 | #005 0003 | Restivo / Merendino | | 3rd |
| 20.7.1975 | Targa Florio | 52 | #911 460 9110 | Capra / Lepri | | 11th |
| 20.7.1975 | 100 mile Mid America I | 59 | | Peter Gregg | Brumos Porsche | 2nd |
| 20.7.1975 | 100 mile Mid America II | 59 | | Peter Gregg | Brumos Porsche | 2nd |
| 20.7.1975 | 100 mile Mid America I | 61 | #911 560 9122 | Jim Busby | Beverly P-A/Mitcom | 7th |
| 20.7.1975 | 100 mile Mid America II | 61 | #911 560 9122 | Jim Busby | Beverly P-A/Mitcom | 7th |
| 20.7.1975 | 100 mile Mid America I | 95 | #911 460 9057 | Bob Hagestad | Hagestad P-A | 6th |
| 20.7.1975 | 100 mile Mid America II | 95 | #911 460 9057 | Bob Hagestad | Hagestad P-A | 6th |
| 20.7.1975 | DARM Hockenheim [T1.6/GT] | 325 | #004 0005 | Hans Halfmann | Tebernum Porsche-Teile | 2nd |
| 20.7.1975 | Euro GT Hockenheim | 602 | | John Fitzpatrick | Gelo-Racing-Team | 24th |
| 20.7.1975 | Euro GT Hockenheim | 603 | | Toine Hezemans | Gelo-Racing-Team | 2nd |
| 20.7.1975 | Euro GT Hockenheim | 605 | #911 460 9052 | Claude Haldi | Porsche Club Romand | 1st |
| 20.7.1975 | Euro GT Hockenheim | 607 | #911 460 9067 | Hartwig Bertrams | Tebernum-Porsche-Racing-Team | 4th |
| 20.7.1975 | Euro GT Hockenheim | 608 | #911 460 9058 | William Vollery | Ecurie du Nord | 16th |
| 20.7.1975 | Euro GT Hockenheim | 610 | #911 460 9053 | Edi Kofel | Mascotte-Racing-Team | DQ |
| 20.7.1975 | Euro GT Hockenheim | 611 | #004 0002 | John Rulon-Miller | Gante Racing | 14th |
| 20.7.1975 | Euro GT Hockenheim | 613 | #911 460 9051 | Claude Ballot-Léna | Ecurie Buchet Paris | DNA |
| 20.7.1975 | DRM Diepholz | | #005 0004 | Cees Siewertsen | Lucky Star Wally's Jeans Kremer Team | 8th |
| 20.7.1975 | Diepholz [GT] | | #005 0004 | Cees Siewertsen | Lucky Star/Wally's Jeans Kremer Team | 1st |
| 20.7.1975 | DRM Diepholz | | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 3rd |
| 3.8.1975 | DRM Nürburgring GP | | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 4th |
| 3.8.1975 | Euro GT Misano | | | John Fitzpatrick | Gelo Racing Team Georg Loos | 2nd |
| 3.8.1975 | Euro GT Misano | | #911 460 9052 | Claude Haldi | Porsche Club Romand | 6th |
| 3.8.1975 | Euro GT Misano | | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche | 3rd |
| 3.8.1975 | Euro GT Misano | | #911 460 9051 | Claude Ballot-Léna | Ecurie Robert Buchet | 5th |
| 9.8.1975 | 1 h Talladega | 14 | #005 0009 | Al Holbert | | 4th |
| 9.8.1975 | 1 h Talladega | 30 | #911 460 9048 | George Dyer | George Dyer | 6th |
| 9.8.1975 | 1 h Talladega | 59 | | Peter Gregg | | 2nd |
| 10.8.1975 | ETCC Zandvoort | 2 | #005 0004 | Siewertsen / Barth | Porsche Kremer Racing | DNF |
| 10.8.1975 | ETCC Zandvoort | 3 | | Schickentanz / Bertrams | Tebernum Racing Team | 3rd |
| 10.8.1975 | ETCC Zandvoort | 6 | | Hezemans / Schenken | Gelo Racing Team | 1st |
| 17.8.1975 | DRM Kassel-Calden | 56 | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | DNF |
| 17.8.1975 | DRM Kassel-Calden | 58 | #005 0004 | Cees Siewertsen | Lucky Star Wallys Jeans Kremer Team | DNF |
| 17.8.1975 | DRM Kassel-Calden | 60 | | John Fitzpatrick | Gelo Racing Team Georg Loos | DNF |
| 17.8.1975 | DRM Kassel-Calden | 61 | | Toine Hezemans | Gelo Racing Team Georg Loos | 5th |
| 17.8.1975 | DRM Kassel-Calden | 65 | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche Racing Team | 6th |
| 17.8.1975 | DRM Kassel-Calden | 76 | #004 0005 | Hans Halfmann | Hans Halfmann | 13th |
| 23.8.1975 | Zandvoort [GT/T] | 210 | | Hans Hoffmann | Tebernum Racing Team | 5th |
| 24.8.1975 | 6 h Mid-Ohio | 1 | #911 460 9048 | Keyser / Dyer | George Dyer | 29th |
| 24.8.1975 | NTK Zandvoort | 7 | | Hartwig Bertrams | Tebernum Porsche Racing | 1st |
| 24.8.1975 | 6 h Mid-Ohio | 14 | #005 0009 | Holbert / Forbes-Robinson | | 1st |
| 24.8.1975 | 6 h Mid-Ohio | 59 | | Gregg / Haywood | | 9th |
| 24.8.1975 | 6 h Mid-Ohio | 61 | #911 560 9122 | Busby / Sprowls / Kirby | | 7th |
| 24.8.1975 | 6 h Mid-Ohio | 95 | #911 460 9057 | Hagestad / Barber | | 8th |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 12 | #005 0005 | Helmut Kelleners | Jägermeister Kremer-Team | 6th |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 15 | #005 0004 | Cees Siewertsen | Lucky Star Wallys Jeans Kremer-Team | 8th |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 18 | | John Fitzpatrick | Gelo Racing Team Georg Loos | 2nd |
| 31.8.1975 | Knutstorp [T/GT] | 19 | | Hartwig Bertrams | | DNA |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 19 | #004 0005 | Hans Halfmann | Tebernum Porsche Racing Team | DNA |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 21 | | Josef Brambring | Josef Brambring | 12th |
| 31.8.1975 | DRM Hockenheim Preis der Nationen | 36 | #911 460 9053 | Edi Kofel | Mascotte-Racing Team | ?th |
| 31.8.1975 | Zolder [GT] | | #004 0005 | Hans Halfmann | Tebernum-Porsche-Racing-Team | 2nd |
| 7.9.1975 | Supersprint Nürburgring | 1 | | Toine Hezemans | GELO-Racing-Team Georg Loos KG | DNA |
| 7.9.1975 | Supersprint Nürburgring | 2 | | John Fitzpatrick | GELO-Racing-Team Georg Loos KG | 3rd |
| 7.9.1975 | Supersprint Nürburgring | 6 | #005 0004 | Cees Siewertsen | Lucky Star Wallys Jeans Kremer Team | 4th |
| 7.9.1975 | Supersprint Nürburgring | 8 | | Hartwig Bertrams | Tebernum-Porsche-Racing-Team Krefeld | DNA |
| 7.9.1975 | Supersprint Nürburgring | 11 | | Josef Brambring | Josef Brambring | 5th |
| 14.9.1975 | Renntraining Diepholz | | #004 0005 | Hans Halfmann | Tebernum Porsche-Racing-Team | 1st |
| 21.9.1975 | Montlhéry | 130 | #911 460 9051 | Claude Ballot-Léna | Ecurie Buchet | raced |
| 28.9.1975 | 6 h Monza | 15 | | Fitzpatrick / Schurti | Gelo Racing Team | DNF |
| 28.9.1975 | 6 h Monza | 16 | | Hezemans / Casoni / Schurti / Fitzpatrick | Gelo Racing Team | 3rd |
| 28.9.1975 | 6 h Monza | 22 | #911 460 9110 | Capra / Lepri / Gottifredi | Girolamo Capra (Scuderia Palladio) | 5th |
| 28.9.1975 | 6 h Monza | 25 | #911 360 0894 | Barraco / Chiaramonte | Scuderia Ateneo | DNA |
| 28.9.1975 | 6 h Monza | 27 | #004 0002 | Rulon-Miller / Heiderich | Ben Heiderich | DNA |
| 28.9.1975 | 6 h Monza | 28 | #911 460 9051 | Ballot-Léna / Andruet | Ecurie Robert Buchet | raced |
| 28.9.1975 | 6 h Monza | 33 | #911 460 9067 | Bertrams / Schickentanz / Ekberg | Tebernum Porsche Racing Team | 1st |
| 28.9.1975 | 6 h Monza | 37 | #005 0003 | Restivo / Merendino | Scuderia Ateneo | DNF |
| 28.9.1975 | DRM Hockenheim Preis von Baden | | #005 0005 | Helmut Kelleners | Jägermeister Kremer-Team | 2nd |
| 28.9.1975 | DRM Hockenheim Preis von Baden | | #004 0005 | Hans Halfmann | Tebernum Porsche-Racing-Team | 12th |
| 28.9.1975 | DRM Hockenheim Preis von Baden | | #005 0004 | Cees Siewertsen | Erwin Kremer | DNF |
| 28.9.1975 | DRM Hockenheim Preis von Baden | | | Josef Brambring | Josef Brambring | 5th |
| 19.10.1975 | Zolder [GT/T+2.0] | 9 | | Josef Brambring | Josef Brambring | DNA |
| 19.10.1975 | Zolder [GT] | 76 | #004 0005 | Hans Halfmann | Hans Halfmann | DNA |
| 19.10.1975 | Zolder [GT] | 85 | | Josef Brambring | Josef Brambring | DNA |
| 2.11.1975 | 200 km Jarama | 4 | | Toine Hezemans | Gelo Racing Team Georg Loos | 2nd |
| 2.11.1975 | 200 km Jarama | 6 | | John Fitzpatrick | Gelo Racing Team Georg Loos | 3rd |
| 2.11.1975 | 200 km Jarama | | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche | DNA |
| 2.11.1975 | 200 km Jarama | | #911 460 9067 | Reinhold Jöst | | 5th |
| 2.11.1975 | 200 km Jarama | | #911 460 9052 | Claude Haldi | Porsche Club Romand | 4th |
| 9.11.1975 | Rheintal Hockenheim [GT] | | #005 0004 | Cees Siewertsen | Lucky Star Wally's Jeans Kremer Team | 1st |
| 9.11.1975 | Rheintal Hockenheim [GT] | | #911 460 9053 | Edi Kofel | | 2nd |
| 9.11.1975 | Rheintal Hockenheim [GT] | | | Josef Brambring | Jägermeister Kremer-Team | 3rd |
| 30.11.1975 | 250 mile Daytona Finale | 14 | #005 0009 | Al Holbert | Holbert's Porsche Audi | 13th |
| 30.11.1975 | 250 mile Daytona Finale | 30 | #911 460 9048 | George Dyer | George Dyer, Jr. | 10th |
| 30.11.1975 | 250 mile Daytona Finale | 59 | | Peter Gregg | Brumos Porsche Audi | 4th |
| 30.11.1975 | 250 mile Daytona Finale | 64 | #911 560 9122 | Jim Busby | | 8th |
| 30.11.1975 | 250 mile Daytona Finale | 95 | #911 460 9057 | Bob Hagestad | Bob Hagestad | 19th |