GFB G-FORCE III Electronic Boost Controller Head Unit ONLY fits_1993-1994`Toyota`Supra`Base~1993-1994`Toyota`Supra`Twin Turbo from 2-7/8 to 4-3/8 in EAT915A550 1999 2000 Chevrolet C3500 fits_1987-1989`GMC`V1500 Suburban`Sierra Classic~1990`GMC`V1500 Suburban`SLE~1987-1991`GMC`V2500 Suburban`Base~1987`GMC`V2500 Suburban`High Sierra~1987-1989`GMC`V2500 Suburban`Sierra Classic~1990`GMC`V2500 Suburban`SLE

GFB G FORCE III Electronic Boost Controller Head Unit ONLY fits_1993 1994`Toyota`Supra`Base~1993 1994`Toyota`Supra`Twin Turbo from 2 7 8 to 4 3 8 in EAT915A550 1999 2000 Chevrolet C3500 fits_1987 1989`GMC`V1500 Suburban`Sierra Classic~1990`GMC`V1500 Suburban`SLE~1987 1991`GMC`V2500 Suburban`Base~1987`GMC`V2500 Suburban`High Sierra~1987 1989`GMC`V2500 Suburban`Sierra Classic~1990`GMC`V2500 Suburban`SLE from 2 7 8 to 4 3 8 in 1982 1990 Buick LeSabre Custom 1977 Buick LeSabre Custom Sport 1985 1990 Buick LeSabre Estate Wagon 1979 1990 Buick LeSabre Limited 1982 Buick LeSabre Limited Edition F E 1974 Buick LeSabre Luxus 1978 1981 Buick LeSabre Sport 1987 Buick LeSabre T Type 1973 1977 Buick Regal Base 1976 1977 Buick Regal SR 1970 1979 Buick Riviera Base 1971 Buick Riviera Gran Sport 1975 Buick Riviera GS 1978 Buick Riviera LXXV Anniversary Edition 1979 Buick Riviera S 1976 Buick Riviera Sport 1976 Buick Riviera SR 1992 1995 Buick Roadmaster Base 1996 Buick Roadmaster Collector's Edition 1991 1995 Buick Roadmaster Estate Wagon 1996 Buick Roadmaster Estate Wagon Collector's Edition 1992 1995 Buick Roadmaster Limited 1996 Buick Roadmaster Limited Collector's Edition 1970