IMSA GT was a sports car racing series organized by International Motor Sports Association. Races took place primarily in the United States and occasionally in Canada.
The 1994 Exxon World Sports Car Championship and Supreme GT Series seasons were the 24th season of the IMSA GT Championship. It was the first year for the new World Sports Car (WSC) class of open-cockpit prototypes in the premiere category, replacing the previous closed-cockpit GTP class. Grand Tourer-style racing cars were also raced and ran in the GTS, GTO, and GTU classes. It began February 5, 1994, and ended October 1, 1994, after nine rounds.
The 1993 Camel GT Championship and Exxon Supreme GT Championship seasons were the 23rd season of the IMSA GT Championship auto racing series. It was the final year of the Camel's sponsorship of the prototype class, and the final year of the GTP and GTP Lights prototype categories before they were replaced with the World Sports Car (WSC) class of prototypes the following year.
The 1992 Camel GT Championship and Exxon Supreme GT Series seasons were the 22nd season of the IMSA GT Championship auto racing series. It was for GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTS, GTO, and GTU classes. It began February 1, 1992, and ended October 11, 1992, after fifteen rounds.
The 1991 Camel GT Championship and Exxon Supreme GT Series seasons were the 21st season of the IMSA GT Championship auto racing series. It was for GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes, as well as a tube-frame All-American Challenge (AAC) class during select rounds. It began February 2, 1991, and ended October 13, 1991, after nineteen rounds.
The 1990 Camel GT Championship season was the 20th season of the IMSA GT Championship auto racing series. It consisted of GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes, as well as a tube-frame All-American Challenge (AAC) class during select GT-only rounds. It began on February 3, 1990, and ended November 11, 1990, after twenty rounds.
The 1989 Camel GT Championship season was the 19th season of the IMSA GT Championship auto racing series. It was for GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes, as well as a tube-frame American Challenge (AC) class during select GT-only rounds. It began February 4, 1989, and ended October 22, 1989, after twenty rounds.
The 1988 Camel GT Championship season was the 18th season of the IMSA GT Championship auto racing series. It was for GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes. It began January 30, 1988, and ended October 23, 1988, after seventeen rounds.
The 1986 Camel GT Championship season was the 16th season of the IMSA GT Championship auto racing series. It was for GTP and Lights classes of prototypes, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes. It began February 1, 1986, and ended October 26, 1986, after eighteen rounds.
The 1985 Camel GT Championship season was the 15th season of the IMSA GT Championship auto racing series. It was for prototypes in the existing GTP class and new, smaller Lights class, as well as Grand Tourer-style racing cars which ran in the GTO and GTU classes. It began on February 2, 1985, and ended on December 1, 1985, after seventeen rounds.
The 1984 Camel GT Championship season was the 14th season of the IMSA GT Championship auto racing series. It was for GTP class prototypes and GTO and GTU class Grand Tourer-style racing cars. It began February 4, 1984, and ended November 25, 1984, after seventeen rounds.
The 1983 Camel GT Championship season was the 13th season of the IMSA GT Championship auto racing series. It was for GTP class prototypes and GTO and GTU class Grand Tourer-style racing cars. It began February 5, 1983, and ended November 27, 1983, after seventeen rounds.
The 1982 Camel GT Championship season was the 12th season of the IMSA GT Championship auto racing series. It was the first year of the GTP class, which combined the previous GTX class of Group 5 cars and prototypes. Other competitors ran in the GTO and GTU classes of Grand Tourer-style racing cars. It began January 30, 1982, and ended November 28, 1982, after nineteen rounds.
The 1981 Camel GT Championship season was the 11th season of the IMSA GT Championship auto racing series. It was a series for GTX class Group 5 cars and GTO and GTU class Grand tourer cars. It began January 31, 1981, and ended November 29, 1981, after sixteen rounds.
The 1980 IMSA GT Series season was the 10th season of the IMSA GT Championship auto racing series. It was a series for GTX class Group 5 cars and GTO and GTU class grand tourer cars. It began February 2, 1980, and ended November 30, 1980, after fourteen rounds.
The 1979 Winston GT season was the 9th season of the IMSA GT Championship auto racing series. It was a series for GTX class Group 5 cars and GTO and GTU class Grand tourer cars. It began February 3, 1979, and ended November 25, 1979, after fifteen rounds.
The 1978 Camel GT Challenge season was the 8th season of the IMSA GT Championship auto racing series. It was the first year of the new GTX class, which allowed for Group 5 cars to compete. The GTO and GTU class Grand tourer cars remained from before. It began February 4, 1978, and ended November 26, 1978, after fourteen rounds.
The 1977 Camel GT Challenge season was the 7th season of the IMSA GT Championship auto racing series. The series was for GTO and GTU class Grand tourer racing cars. It began February 5, 1977, and ended October 26, 1977, after sixteen rounds.
The 1974 Camel GT Challenge season was the 4th season of the IMSA GT Championship auto racing series. The series was for GTO and GTU class Grand tourer racing cars. It began April 21, 1974, and ended December 1, 1974, after twelve rounds. 1974 would be the first time that the series would leave the United States, with races in Canada and Mexico. It would also be the only time IMSA GT would leave northern North America. The TO and TU classes, which had been composed of former Trans Am Series cars from before the championship's debut, were dropped due to Trans Am having been "absorbed" by IMSA GT and thus becoming nigh indistinguishable from IMSA.
The 1973 Camel GT season was the 3rd season of the IMSA GT Championship auto racing series. It was for Grand Tourer-style racing cars which ran in the GTO and GTU classes, as well as former Trans Am Series cars in the TO and TU classes. It began March 24, 1973, and ended November 25, 1973, after ten rounds. This year marked the decline of Trans Am and the beginning of it and IMSA GT becoming nigh indistinguishable.
#14 Holbert Racing 
#01 AT&T Spice 
Geoff Brabham 
Charles Monk
Jochen Mass