ARP Pontiac Head Studs Kits, It is for good reason that virtually every top professional engine builder relies on ARP head studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on the market today.
For openers, ARP Pontiac Head Studs Kits uses a premium grade 8740 alloy that is rated far superior to “aircraft” quality. Then, 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 ARP Head Stud are 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 Pontiac Head Studs Kits 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.
ARP Head Stud Kits are thread rolled after heat-treat, which gives them about 1000% (that’s ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it’s tough on tooling, but the results are well worth the extra effort.
You will also note that ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the “stretch” of both studs, which makes for a more consistent clamping force – and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing!
Premium quality heat-treated 8740 chrome moly steel head stud kits are available for most every domestic and import applications. You won’t find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality.
ARP Pontiac Head Studs Kits are available with your choice of conventional hex nuts or compact 12-point nuts. Premium quality parallel ground washers are also included with each kit. Clearly, they are the best on the market today, and the favorite of leading professional engine builders in all forms of racing.
Head Bolt and Stud Tech Tips
HEAD STUDS vs. BOLTS
This product is in the following categories:
Bolt Kits, Studs, Fasteners
Head Bolts and Head Studs
Part #: 190-4002
Pontiac 350-400-428-455 cid with D port heads (1967 & later), Hex nuts, ARP Head Studs 190-4002
Part #: 190-4003
Pontiac 400 Ram Air 2 and 4, 455 HO and 455 Super Duty with Round port heads (1968-1974), Hex nuts, ARP Head Studs 190-4003
Part #: 190-4005
Pontiac Ram Air 5, Hex nuts, ARP Head Studs 190-4005
Part #: 190-4201
Pontiac Ram Air 2 & 455, 12-point nuts, ARP Head Studs 190-4201
Part #: 190-4202
Pontiac 350-400-428-455 cid with D port heads (1967 & later), 12-point nuts, ARP Head Studs 190-4202
Part #: 190-4203
Pontiac 400 Ram Air 2 and 4, 455 HO and 455 Super Duty with Round port heads (1968-1974), 12-point nuts, ARP Head Studs 190-4203
Part #: 190-4205
Pontiac Ram Air 5, 12-point nuts, ARP Head Studs 190-4205
Part #: 190-4304
Pontiac 400-455 cid with Edelbrock heads (manufacturing before 3/15/02), 12-point nuts, ARP Head Studs 190-4304
Part #: 190-4305
Pontiac 400-455 cid with Edelbrock heads (manufacturing after 3/15/02), 12-point nuts, ARP Head Studs 190-4305
Part #: 191-4001
Pontiac Iron Duke 4 cylinder 1/2", Hex nuts, ARP Head Studs 191-4001
Part #: 191-4201
Pontiac Iron Duke 4 cylinder 1/2", 12-point nuts, ARP Head Studs 191-4201
Part #: 193-4001
Pontiac 3800 supercharged V6 (L67 Regal, SC Monte Carlo, Impala) (1999 & later), Hex nuts, ARP Head Studs 193-4001
Part #: 193-4002
Pontiac 3800 supercharged V6 (L67 Regal, SC Monte Carlo, Impala) (1999 & later), 12-point nuts, ARP Head Studs 193-4002
Part #: 290-4101
Pontiac Super Duty 4 cylinder with "Iron Duke" head, Hex nuts, ARP Head Studs 290-4101
Part #: 290-4301
Pontiac Super Duty 4 cylinder with "Iron Duke" head, 12-point nuts, ARP Head Studs 290-4301