IMSA GT Championship

Sezon	Klasa	Mistrz Kierowców	Mistrz Producentów	Trofeum
1998	WSC	Butch Leitzinger	Ferrari
	GT1	Andy Wallace  David Brabham	Panoz
	GT2	Larry Schumacher	Porsche
	GT3	Mark Simo	BMW
1997	WSC	Butch Leitzinger	Ford
	GTS-1	Andy Pilgrim	Porsche
	GTS-2	Larry Schumacher	Porsche
	GTS-3	Bill Auberlen	BMW
1996	WSC	Wayne Taylor	Oldsmobile
	GTS-1	Irv Hoerr	Oldsmobile
	GTS-2	Larry Schumacher	BMW
1995	WSC	Fermin Velez	Ferrari
	GTS-1	Irv Hoerr	Oldsmobile
	GTS-2	Jorge Trejos	Porsche
1994	WSC	Wayne Taylor	Oldsmobile
	GTS	Steve Millen	Nissan
	GTO	Joe Pezza
	GTU	Jim Pace	Nissan
1993	GTP	Juan Manuel Fangio II	Toyota
	Lights	Parker Johnstone	Acura
	GTS	Tom Kendall	Oldsmobile
	GTO	Charles Morgan
	GTU	Butch Leitzinger	Nissan
1992	GTP	Juan Manuel Fangio II	Toyota
	Lights	Parker Johnstone	Acura
	GTS	Steve Millen	Nissan
	GTO	Irv Hoerr
	GTU	David Loring	Nissan
1991	GTP	Geoff Brabham	Nissan
	Lights	Parker Johnstone	Acura
	GTO	Pete Halsmer	Mazda
	GTU	John Fergus	Nissan
	AAC	Dick Greer
1990	GTP	Geoff Brabham	Nissan
	Lights	Tomás López	Buick
	GTO	Dorsey Schroeder	Mercury
	GTU	Lance Stewart	Mazda
1989	GTP	Geoff Brabham	Nissan
	Lights	Scott Schubot	Buick
	GTO	Pete Halsmer	Mercury
	GTU	Bob Leitzinger	Mazda
1988	GTP	Geoff Brabham	Porsche
	Lights	Tom Hessert	Pontiac
	GTO	Scott Pruett	Lincoln-Mercury
	GTU	Tom Kendall	Chevrolet
1987	GTP	Chip Robinson	Porsche
	Lights	Jim Downing	Pontiac
	GTO	Chris Cord	Toyota
	GTU	Tom Kendall	Mazda
1986	GTP	Jim Downing	Mazda	Argo (Chassis)  Mazda (Engine)
	Lights	Al Holbert	Porsche	Porsche (Chassis)  Porsche (Engine)
	GTO	Scott Pruett	Ford	Scott Pruett (GTE)
	GTU	Tom Kendall	Mazda
1985	GTP	Al Holbert	Porsche	Porsche (Chassis)  Porsche (Engine)
	Lights	Jim Downing	Mazda	Argo (Chassis)  Mazda (Engine)
	GTO	John Jones	Ford
	GTU	Jack Baldwin	Mazda
1984	GTP	Randy Lanier	Chevrolet	March (Chassis)  Chevrolet (Engine)
	GTO	Roger Mandeville	Chevrolet
	GTU	Jack Baldwin	Mazda
1983	GTP	Al Holbert	Porsche	March (Chassis)  Porsche (Engine)
	GTO	Wayne Baker	Porsche
	GTU	Roger Mandeville	Mazda
1982		John Paul
	GTP/GTX	John Paul Jr	Porsche
	GTO	Don Devendorf	Chevrolet
	GTU	Jim Downing	Mazda
1981		Brian Redman
	GTX		Porsche
	GTO	Dave Cowart	BMW
	GTU	Lee Mueller	Mazda
1980		John Fitzpatrick		Chevrolet (AAGT)
	GTX		Porsche
	GTO	Luis Mendez	Porsche
	GTU	Walt Bohren	Mazda
1979		Peter Gregg		Chevrolet (AAGT)
	GTX		Porsche
	GTO	Howard Meister	Porsche
	GTU	Don Devendorf	Datsun
1978		Peter Gregg		Chevrolet (AAGT)
	GTX		Porsche
	GTO	Dave Cowart	Porsche
	GTU	Dave White	Porsche
1977		Al Holbert		Chevrolet (AAGT)
	GTO		Porsche
	GTU	Walt Maas	Porsche
	TO		BMW
	TU		Alfa Romeo
1976		Al Holbert		Chevrolet (AAGT)
	GTO		Porsche
	GTU	Brad Frisselle	Datsun
	TO		BMW
	TU		Alfa Romeo
1975		Peter Gregg		Chevrolet (AAGT)
	GTO		Porsche
	GTU	Bob Sharp	Datsun
	TO		BMW
	TU		Mazda
1974		Peter Gregg
	GTO		Porsche
	GTU	Walt Maas	Porsche
	TO		Chevrolet
	TU		Ford
1973		Peter Gregg
	GTO	Peter Gregg	Porsche
	GTU	Bob Bergstrom	Porsche
	TO	Maurice Carter	Chevrolet
	TU	Dave Nicholas  John Magee	BMW
1972		Hurley Haywood
	GTO	Phil Currin	Chevrolet
	GTU	Hurley Haywood	Porsche
	TO	Maurice Carter	Chevrolet
	TU	Carson Baird	BMW
1971		Peter Gregg  Hurley Haywood
	GTO	Dave Heinz	Chevrolet
	GTU	Peter Gregg  Hurley Haywood	Porsche
	TO	Robert Hennig	Chevrolet
	TU	Clint Abernethy	Austin