ARP Head Bolt Kit High Performance 8740 Series Hex Head

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
1968 - 1971	Oldsmobile	442	Base
1971 - 1974	Oldsmobile	98	Base
1975 - 1976	Oldsmobile	98	Luxury
1973 - 1976	Oldsmobile	98	Regency
1974 - 1976	Oldsmobile	Custom Cruiser	Base
1975 - 1976	Oldsmobile	Custom Cruiser	Panel
1975	Oldsmobile	Cutlass	442
1973 - 1975	Oldsmobile	Cutlass	Base
1976	Oldsmobile	Cutlass	Colonnade S, Vista Cruiser
1973 - 1976	Oldsmobile	Cutlass	S
1975 - 1976	Oldsmobile	Cutlass Salon	Base
1973 - 1976	Oldsmobile	Cutlass Supreme	Base
1976	Oldsmobile	Cutlass Supreme	Colonnade
1974 - 1975	Oldsmobile	Cutlass Supreme	Cruiser
1975	Oldsmobile	Cutlass Supreme	Hurst
1976	Oldsmobile	Cutlass Tiara	Base
1971 - 1976	Oldsmobile	Delta 88	Base, Royale
1971	Oldsmobile	Delta 88	Custom
1974 - 1976	Oldsmobile	Omega	Base
1976	Oldsmobile	Omega	Brougham, F85, SX
1975	Oldsmobile	Omega	Salon
1974	Oldsmobile	Toronado	Base
1974 - 1976	Oldsmobile	Toronado	Brougham
1975 - 1976	Oldsmobile	Toronado	Custom
1968 - 1975	Oldsmobile	Vista Cruiser	Base