ARP Head Stud Kits 8740 12Point Head Nissan RB20 / RB25

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
1991 - 1998	Nissan	240SX	LE
1989 - 1998	Nissan	240SX	SE, Base
1989 - 1990	Nissan	240SX	XE
1997 - 1998	Nissan	Skyline	2.8 Nismo 400R
2002	Nissan	Skyline	250GTm, Nur Spec, 350GT-8, Nur Spec II
2001 - 2002	Nissan	Skyline	300GT, 250GTe, 250GT, M-Spec, 250GT Four
1992 - 1993	Nissan	Skyline	Autech Version
1998 - 2001	Nissan	Skyline	GT, 25GT-X Four, 25GT-X Turbo, GT-SE, 25GT-V, 25GT Four, 25GT-X, 25GT Turbo, 25GT
1989 - 2002	Nissan	Skyline	GT-R
1991 - 1993	Nissan	Skyline	GTS Type-J, GTS25 Type-XG, GXI Type-X, GTE Type-X
1993 - 1994	Nissan	Skyline	GTS-25
1989 - 1998	Nissan	Skyline	GTS-4, GTS, GTS Type-S
1989 - 1993	Nissan	Skyline	GTS-t Type-M
1989 - 1991	Nissan	Skyline	GTS-t, GXi, GTE
1993 - 1995	Nissan	Skyline	GTS25 Type-G, GTS25t Type-M
1991 - 1998	Nissan	Skyline	GTS25 Type-S, GTS25 Type-X
1995	Nissan	Skyline	GTS25, GTS Type-G, GTS-4 Type-G, GTS25 Type-G SE, GTS25t Type-M AERO, GTS Urban Runner S, GTS Urban Runner, GTS25t Type-G
1993 - 1998	Nissan	Skyline	GTS25t Type-M ACTIVE LSD
1996 - 1998	Nissan	Skyline	GTS25t Type-M Spec-I, GTS25 Type-SS, GTS-4 Type-X, GTS Type-X, GTS25t Type-M Spec-II
1993 - 2002	Nissan	Skyline	V-Spec
1994	Nissan	Skyline	V-Spec II
1999 - 2002	Nissan	Skyline	V-Spec II N1