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BB Chevy 396, 402, 427 and 454 Cid, Cast Iron OEM, Mark IV with Aluminum factory head and early Bowtie) Hex Nuts, Head Stud Kit | 913135-4001
BB Chevy 396, 402, 427 and 454 Cid, Cast Iron OEM, Mark IV with Aluminum factory head and early Bowtie) Hex Nuts, Head Stud Kit | 913135-4001

ARP Auto Racing

BB Chevy 396, 402, 427 and 454 Cid, Cast Iron OEM, Mark IV with Aluminum factory head and early Bowtie) Hex Nuts, Head Stud Kit | 913135-4001

Part #913135-4001
$436.99

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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 only uses premium grade 8740 alloy and a proprietary ARP2000® alloy that are rated far superior to “aircraft” quality alloy steels. Secondly, each stud is placed vertically into special racks and precisely heat-treated to 190,000 psi for the 8740 material and 220,000 psi for the ARP2000® material. 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. 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. ARP studs are thread rolled after heat-treat, which gives them about 2000% (that’s twenty times) better fatigue strength than those studs that are threaded prior to heat-treat. 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 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-Grade Construction – Made from high-strength materials for superior durability.
  • Secure Cylinder Head Mounting – Ensures reliable attachment to the engine block and consistent operation.
  • Precision Machined Threads – Provides accurate fit and dependable torque retention.
  • Resists Loosening – Designed to withstand engine vibration, thermal stress, and high torque.
  • Performance-Ready Hardware – Ideal for racing, high-performance, and heavy-duty engines.
  • Corrosion-Resistant Finish – Protects against rust and environmental exposure.
  • Reliable Long-Term Performance – Maintains consistent clamping force and engine integrity over time.
Details
BrandARP Auto Racing
Product Dimensions 6.35 x 10.16 x 21.59 inches
Manufacturer Part Number135-4001
Vehicle Fitment
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