Engine Kits

Chevy BB, 3/8" Dia. Bolt, Drilled, .875" UHL, 12 Point Header Bolts
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ARP Bolts

Chevy BB, 3/8" Dia. Bolt, Drilled, .875" UHL, 12 Point Header Bolts

Part #: 400-1204
List Price: $71.98
Our Price: $47.97
You Save: $24.01

Chevy Big Block, 3/8" diameter bolt, drilled, 3/8" wrench, 16 pack, 3/8" Size, .875" Under Head Length, 12-point head, Stainless 300, ARP Header Bolts 400-1204
ARP Chevy BB Header Bolts & Header Studs are manufactured in 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.

ARP Chevy BB Header Bolts & Header Studs that are Stainless 300 material are 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!

Each ARP accessory stud or bolt kit includes the specific number of parts for your application, plus premium-quality washers and hex or 12-point nuts, as required. Studs are manufactured with a unique nut-starter nose that helps prevent cross-threading.

ARP Chevy BB Header Bolts & Header Studs come either black oxide chrome moly or Stainless 300. Both are nominally rated at 170,000 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 Special “NASCAR” model prevent loosening.

Studs are measured OAL (Over All Length) and Bolts are measured UHL (Under Head Length) 

Brand ARP
Fastener Finish Polished
Fastener Material Stainless steel
Fastener Style Bolt
Head Style 12-point
Notes 3/8 in. wrench head size.
Part Type Header Fasteners
Product Line ARP Stainless Steel Header Bolts
Quantity Sold as a set of 16.
Thread Size 3/8-16 in.
Underhead Length (in) 0.875 in.
Underhead Length (mm) 22mm

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