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| Chassis | Engine | Year | Group | First owner | Next owners (year) | Comment |
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| DG-1 #001 | Mazda 2-rotor | 1989 | Light | Downing/Atlanta Racing | Raced by Ecurie Scientific in 1991. | |
| DG-1 #002 | Buick V6 | 1990 | Light | Essex Racing | ||
| DG-1 #003 | Buick V6 | 1991 | Light | Essex Racing | Converted to DG-2 (Light), was never fully converted, became the first WSC. | |
| DG-2 #004 | Buick V6 | 1992 | Light | Andy Evans | Leight Miller => Mazda Speed | Converted to DG-2 WSC, tub was then used to build a new DG-3 WSC with Mazda engine (to replace car destroyed at Sebring '95), 7th at Le Mans '95, rear end assemly was used to build chassis #008. Sold to Mazda Speed. |
| DG-2 #005 | Buick V6 | 1992 | Light | => TRV Motorsports => Jacobs | In 1994 converted to Chevrolet powered DL-4 #01 WSC car. | |
| DG-3 #006 | Mazda 3-rotor | 1993 | Light | Downing/Atlanta Racing | Converted to DG-3 WSC, destroyed at Sebring 1995. | |
| DLM #007 | Mazda 3-rotor | 1996 | WSC | Downing/Atlanta Racing | Raced by Downing/Atlanta Racing in 1997 and 1998. | |
| DLM #008 | Buick V6 | 1997 | WSC | Downing/Atlanta Racing | => Davin Racing (1997) | |
| DLM-4 #009 | Mazda 4-rotor | 1997 | WSC | Downing/Atlanta Racing | => Jacobs | Raced by Downing/Atlanta Racing in 1997 and 1998. Raced by Jacobs Motorsports in 2000. |
| DLY #010 | Mazda 4-rotor | 1998 | LMP | Downing/Atlanta Racing | Debut at Petit Le Mans 1998. For 2000 season highly rebodied. |
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