ARP Head Stud Kits 12pt Head 10 Valve Audi 100 Quattro Base 1989-1991

It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's not a better stud setup on the market today. For openers, ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.

Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It's important to note that lesser quality studs are not even centerless ground the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned something that won't happen with inferior quality head studs

Vehicle Fitments:

Year	Make	Model	Submodel
1989 - 1991	Audi	100	Base
1989	Audi	100	E
1989 - 1991	Audi	100 Quattro	Base
1989 - 1991	Audi	200	Base
1991	Audi	200 Quattro	Avant, 20v Avant, 20v
1989 - 1991	Audi	200 Quattro	Base
1980 - 1983	Audi	4000	Base
1982 - 1983	Audi	4000	GT, S
1986 - 1987	Audi	4000 Quattro	CS
1984 - 1987	Audi	4000 Quattro	S
1978 - 1985	Audi	5000	Base
1986 - 1988	Audi	5000	CS
1985	Audi	5000	CS Turbo
1979 - 1988	Audi	5000	S
1980 - 1985	Audi	5000	S Turbo
1986 - 1988	Audi	5000 Quattro	CS
1987 - 1988	Audi	5000 Quattro	S
1991 - 1992	Audi	80	Base
1988 - 1992	Audi	80 Quattro	Base
1988 - 1991	Audi	90	Base
1988 - 1989	Audi	90 Quattro	Base
1981 - 1985	Audi	Coupe	Base
1986 - 1987	Audi	Coupe	GT
1983 - 1985	Audi	Quattro	Base