ARP Head Stud Kits 8740 Series 12Point Head Nissan 240Z Base 1970-1973

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
1970 - 1973	Nissan	240Z	Base
1974 - 1975	Nissan	260Z	Base, 2+2
1975 - 1978	Nissan	280Z	2+2, Base
1982 - 1983	Nissan	280ZX	2+2 Turbo, Turbo
1979 - 1983	Nissan	280ZX	2+2, Base
1981	Nissan	280ZX	GL Turbo
1980 - 1981	Nissan	280ZX	GL, 2+2 GL
1977 - 1980	Nissan	810	Base
1981	Nissan	810	DX
1982 - 1984	Nissan	Maxima	GL
1981	Nissan	Maxima	SL