ARP Audi 5-Cylinder 12pt Undercut Head Stud KitVehicle Fitment: 1980 1983 Audi 4000 Base 1981 1987 Audi Coupe Base 1983 1985 Audi Quattro Base 1991 1992 Audi 80 Base 1988 1992 Audi 80 Quattro Base 1988 1991 Audi 90 Base 1988 1989 Audi 90 Quattro Base 1989 1991 Audi 100 Base 1989 Audi 100 E 1989 1991 Audi 100 Quattro Base 1989 1991 Audi 200 Base 1989 1991 Audi 200 Quattro Base 1984 1987 Audi 4000 Quattro S 1987 1988 Audi 5000 Quattro S 1986 1988 Audi 5000 Quattro CS What's Included: ARP Audi 5