ARP manufactures a variety of premium grade bolt and stud kits to facilitate installation of exhaust headers including the popular stainless stud kit with 12-point nuts. The ARP Stainless material is not affected by corrosion or extreme heat, making it ideal for the application. What's more, the compact 12-point nut lets you easily slip a socket close to the pipe.

Studs are manufactured with a unique nut-starter nose that helps prevent cross-threading. Studs and bolts come either black oxide chrome moly or polished ARP Stainless. Both are nominally rated at 180,000 psi tensile strength; substantially stronger than Grade 8 hardware.

Specially drilled NASCAR models are available for those who wish to safety wire their header bolts to prevent loosening.

Details:

• Material: 8740 Chrome Moly
• Finish: Black Oxide
• Kit Style: Bolt Kit
• Head Style: 12-Point
• Thread Size: 3/8 Inch
• UHL: 0.750 Inch
• Set Qty: 14
• Package Type: Skin
• Kit Type: Stud

Fitment Notes:

• Make: Oldsmobile
• Application: 330-455 cid