| 6.6.1999 | Belcar Spa SER | 11 | Mantara LM600 | Dupont / Willems | Marcos International | 4th |
| 6.6.1999 | Belcar Spa SER | 12 | Mantara LM600 | Euser / Buurman | Marcos International | 25th |
| 6.6.1999 | Belcar Spa SER | 17 | Mantis | Vermeiren / Lancksweerd | Marcos Racing Team Belgium | 39th |
| 13.6.1999 | 24 h Le Mans | | Mantara LM500 | Davidson / Smith | Alistair Davidson | DNA |
| 20.6.1999 | SM GTR Anderstorp | 19 | Mantara LM500 | Erik Holmqvist | Team Total | 12th/8th |
| 20.6.1999 | British GT Brands Hatch | 77 | Mantara LM600 | Erdos / Purvis | Marcos Cars/NCK Motorsport | 7th |
| 27.6.1999 | 500 km Hockenheim | 10 | Mantara LM600 | Euser / Buurman | Marcos Racing International | 10th |
| 27.6.1999 | 500 km Hockenheim | 11 | Mantara LM600 Evo | Herman Buurman | Marcos Racing International | DNA |
| 4.7.1999 | 500 km Hungaroring | 10 | Mantara LM600 | Euser / Buurman | Marcos Racing International | 14th |
| 4.7.1999 | 500 km Hungaroring | 11 | Mantara LM600 Evo | Herman Buurman | Marcos Racing International | DNA |
| 11.7.1999 | British GT Silverstone | 36 | Mantara LM600 | Keith McKenzie | Cirtek Motorsport | DNA |
| 11.7.1999 | British GT Silverstone | 48 | Mantara LM500 | Wyatt / Webb | GW Racing | DNA |
| 11.7.1999 | British GT Silverstone | 71 | Mantis | Mayall / Horner | Arrowstar Racing | 16th |
| 11.7.1999 | British GT Silverstone | 72 | Mantis | Griffiths / Pollard | Blackwater/John Griffiths Motorsport | raced |
| 11.7.1999 | British GT Silverstone | 73 | Mantis | Jackson / Liles | Mark Jackson | raced |
| 11.7.1999 | British GT Silverstone | 74 | Mantis | Caine / Davies | Promotasport | 23rd |
| 11.7.1999 | British GT Silverstone | 75 | Mantis | Balfe / Taylor | Barclays Premier | 19th |
| 11.7.1999 | British GT Silverstone | 76 | Mantis | Croft / Brown | Ian Croft | raced |
| 11.7.1999 | British GT Silverstone | 77 | Mantara LM600 | Erdos / Purvis | Marcos Cars/NCK Motorsport | 7th |
| 11.7.1999 | British GT Silverstone | 78 | Mantara LM500 | Millward / Sands | Marcos Cars/NCK Motorsport | 26th |
| 11.7.1999 | British GT Silverstone | 91 | Mantis | Taylor / Stephens | Taylors Foundry Motor Sport Ltd. | raced |
| 11.7.1999 | British GT Silverstone | 92 | Mantis | Tully / Dove | David Dove Racing Team | raced |
| 11.7.1999 | British GT Silverstone | 93 | Mantis | Angelo / Padmore | Promotasport | raced |
| 11.7.1999 | British GT Silverstone | 94 | Mantis | Marshall / Kinchin | CP (Cinque Ports) Motorsport Ltd. | raced |
| 11.7.1999 | British GT Silverstone | 95 | Mantis | Hann / Goodward-Watts | Richard Hann/Screwfix Direct | raced |
| 11.7.1999 | British GT Silverstone | 96 | Mantis | Cadman / Frost | Cadini Motorsport | raced |
| 18.7.1999 | 500 km Zolder | 10 | Mantara LM600 | Willems / Dupont | Marcos Racing International | DNF |
| 18.7.1999 | 500 km Zolder | 11 | Mantara LM600 | Euser / Buurman | Marcos Racing International | DNF |
| 18.7.1999 | Belcar Zolder FIA GT | 11 | Mantara LM600 | Dupont / Willems | Marcos International | DNF |
| 18.7.1999 | Belcar Zolder FIA GT | 12 | Mantara LM600 | Euser / Buurman | Marcos International | 4th |
| 18.7.1999 | Belcar Zolder FIA GT | 17 | Mantis | Vermeiren / Lancksweerd | Marcos Racing Team Belgium | 26th |
| 18.7.1999 | SM GTR Falkenberg | 19 | Mantara LM500 | Erik Holmqvist | Team Total | 15th/13th |
| 18.7.1999 | Belcar Zolder FIA GT | 42 | Mantis | Molenaers / Neyens | Marcos Racing Team Belgium | 13th |
| 18.7.1999 | Belcar Zolder FIA GT | 43 | Mantara LM500 | Smolders / Cauwberghs | Marcos Racing Team Belgium | 33rd |
| 1.8.1999 | SM GTR Anderstorp | 19 | Mantara LM500 | Erik Holmqvist | Team Total | 15th/DNF |
| 7.8.1999 | British GT Donington I | 76 | Mantis | Kinchin / Konig | HKM | NC |
| 7.8.1999 | British GT Donington I | 77 | Mantara LM600 | Purvis / Erdos | Marcos Cars/NCK Motorsport | DNF |
| 7.8.1999 | British GT Donington I | 78 | Mantara LM500 | Lockie / Marsh | NCK Motorsport | DNF |
| 8.8.1999 | 500 km Oschersleben | 10 | Mantara LM600 Evo | Hezemans / Buurman | Marcos Racing International | DNS |
| 8.8.1999 | British GT Donington II | 76 | Mantis | Kinchin / Konig | HKM | NC |
| 8.8.1999 | British GT Donington II | 77 | Mantara LM600 | Purvis / Erdos | Marcos Cars/NCK Motorsport | 6th |
| 8.8.1999 | British GT Donington II | 78 | Mantara LM500 | Lockie / Marsh | NCK Motorsport | NC |
| 22.8.1999 | British GT Silverstone | 45 | Mantis | Pieter van Soelen | Marcos Racing International | 14th |
| 22.8.1999 | British GT Silverstone | 46 | Mantara LM600 Evo | Euser / Lockie | Marcos Racing International | 7th |
| 22.8.1999 | British GT Silverstone | 47 | Mantis | Hayles / Kinchin | CP Motorsport | 15th |
| 22.8.1999 | British GT Silverstone | 49 | Mantis | Rob Knook | Marcos Racing International | 13th |
| 22.8.1999 | British GT Silverstone | 71 | Mantis | Horner / Stack | Arrowstar Racing | DNF |
| 22.8.1999 | British GT Silverstone | 77 | Mantara LM600 | Purvis / Erdos | Marcos Cars/NCK Motorsport | DNF |
| 22.8.1999 | British GT Silverstone | 91 | Mantis | Peter Van der Kolk | Marcos Racing International | 16th |
| 29.8.1999 | SM GTR Mantorp Park | 19 | Mantara LM500 | Erik Holmqvist | Team Total | 16th/DNF |
| 5.9.1999 | 500 km Donington | 10 | Mantara LM600 Evo | Buurman / Hezemans | Marcos Racing International | DNA |
| 5.9.1999 | 24 h Zolder | 12 | Mantara LM600 Evo | Buurman / de Dryver / Euser | Marcos International | 4th |
| 5.9.1999 | 24 h Zolder | 17 | Mantis | Lancksweerd / Vermeiren / Erwin | Marcos Racing Team Belgium | DNF |
| 5.9.1999 | 24 h Zolder | 42 | Mantis | Molenaers / Neyens / Vahsen | Marcos Racing Team Belgium | DNF |
| 5.9.1999 | 24 h Zolder | 43 | Mantara LM500 | Smolders / Cauwberghs / Goelen | Marcos Racing Team Belgium | DNF |
| 5.9.1999 | British GT Croft | 46 | Mantara LM600 Evo | Lockie / Ward | Marcos Racing International | DNS |
| 5.9.1999 | British GT Croft | 47 | Mantis | Gary Kinchin | CP Motorsport | DNF |
| 5.9.1999 | British GT Croft | 48 | Mantis | Curtis Hayles | CP Motorsport | 6th |
| 5.9.1999 | British GT Croft | 72 | Mantis | Ed Horner | Arrowstar Racing | DNF |
| 5.9.1999 | British GT Croft | 76 | Mantis | Wheals / Cooper | | DNF |
| 5.9.1999 | British GT Croft | 77 | Mantara LM600 | Purvis / Erdos | Marcos Cars/NCK Motorsport | DNF |
| 5.9.1999 | British GT Croft | 97 | Mantis | Tully / Dove | David Dove Racing | DNF |
| 26.9.1999 | Belcar Spa RF | 11 | Mantara LM600 | Dupont / Willems | Marcos International | DNF |
| 26.9.1999 | Belcar Spa RF | 12 | Mantara LM600 Evo | Euser / Buurman | Marcos International | DNF |
| 26.9.1999 | Belcar Spa RF | 14 | Mantis | Sijthoff / Sijthoff / Ploeg | | 19th |
| 26.9.1999 | Belcar Spa RF | 17 | Mantis | Vermeiren / Lancksweerd | Marcos Racing Team Belgium | DNF |
| 26.9.1999 | Belcar Spa RF | 42 | Mantis | Molenaers / Neyens | Marcos Racing Team Belgium | DNF |
| 26.9.1999 | Belcar Spa RF | 43 | Mantara LM500 | Smolders / Cauwberghs | Marcos Racing Team Belgium | DNA |
| 26.9.1999 | British GT Spa | 45 | Mantis | Peter Van der Kolk | Van Der Kolk Racing | DNA |
| 26.9.1999 | British GT Spa | 46 | Mantara LM600 Evo | Lockie / Euser | Marcos Racing International | 6th |
| 26.9.1999 | British GT Spa | 47 | Mantis | Kinchin / Rymer | C P Motorsport | 13th |
| 26.9.1999 | British GT Spa | 48 | Mantis | Konig / Hayles | C P Motorsport | 12th |
| 26.9.1999 | British GT Spa | 49 | Mantis | Pieter van Soelen | Van Soelen Racing | DNA |
| 26.9.1999 | British GT Spa | 71 | Mantis | Stoeltie / Deelstra | Stoeltie Racing | 14th |
| 26.9.1999 | British GT Spa | 73 | Mantis | Bob Sythoff | Sythoff Racing | DNF |
| 26.9.1999 | British GT Spa | 74 | Mantis | Davies / Harris | Promotasport | 18th |
| 26.9.1999 | British GT Spa | 75 | Mantis | Diedrich Sythoff | Sythoff Racing | unused |
| 26.9.1999 | British GT Spa | 77 | Mantara LM600 | Erdos / Purvis | Marcos Cars/NCK Motorsport | DNF |
| 26.9.1999 | British GT Spa | 91 | Mantis | Rob Knook | Knook Racing | DNA |
| 26.9.1999 | British GT Spa | 94 | Mantis | Hann / Goddard-Watts | Richard Hann/Screwfix Direct | 17th |
| 10.10.1999 | British GT Silverstone | 39 | Mantara LM500 | Newman / Wyatt | GW Racing | DNF |
| 10.10.1999 | British GT Silverstone | 45 | Mantis | Peter Van der Kolk | Marcos Racing International | DNA |
| 10.10.1999 | British GT Silverstone | 46 | Mantara LM600 Evo | Lockie / Euser | Marcos Racing International | 19th |
| 10.10.1999 | British GT Silverstone | 47 | Mantis | Rymer / Kinchin | CP Motorsport | 18th |
| 10.10.1999 | British GT Silverstone | 48 | Mantis | Hayles / Hay | HK Motorsport | DNF |
| 10.10.1999 | British GT Silverstone | 64 | Mantis | Cooper / Wheals | Arrowstar Racing | DNF |
| 10.10.1999 | British GT Silverstone | 71 | Mantis | Stoeltie | Stoeltie Racing | 15th |
| 10.10.1999 | British GT Silverstone | 73 | Mantis | Sythoff / Sythoff | Sythoff Racing | 17th |
| 10.10.1999 | British GT Silverstone | 74 | Mantis | Davies / Harris | Andrew Davies | 14th |
| 10.10.1999 | British GT Silverstone | 77 | Mantara LM600 | Purvis / Erdos | Marcos Cars/NCK Motorsport | 4th |
| 10.10.1999 | British GT Silverstone | 78 | Mantara LM500 | Byford / Millward | Marcos Cars/NCK Motorsport | DNF |
| 10.10.1999 | British GT Silverstone | 83 | Mantis | Griffiths / Pollard | | 16th |
| 10.10.1999 | British GT Silverstone | 92 | Mantis | Taylor / Balfe | | 13th |
| 10.10.1999 | British GT Silverstone | 95 | Mantis | Brown / Woollcott | Sceptre Racing | DNA |
| 10.10.1999 | British GT Silverstone | 99 | Mantis | Justin Cadman | Anixter/Brookspeed | DNF |
| 17.10.1999 | Belcar Zolder BM | 11 | Mantara LM600 | Dupont / Willems | Marcos International | 2nd |
| 17.10.1999 | Belcar Zolder BM | 17 | Mantis | Vermeiren / Lancksweerd | Marcos Racing Team Belgium | 30th |
| 17.10.1999 | Belcar Zolder BM | 42 | Mantis | Molenaers / Neyens | Marcos Racing Team Belgium | 8th |
| 24.10.1999 | Spanish GT Barcelona | 24 | Mantis | Stoeltie / Deelstra | Marcos Racing International | DNF/DNS |
| 24.10.1999 | Spanish GT Barcelona | 26 | Mantis | Vandercole / Roelse | Marcos Racing International | 13th/24th |