What material are these header bolts made from?

These ARP header bolts are made from stainless steel. This material is chosen for its resistance to corrosion and ability to withstand the heat and vibration found in an engine bay.

Why are the bolt heads drilled?

The drilled heads are designed to accept safety wire. Running safety wire through the holes and around the header flange helps prevent the bolts from loosening due to engine vibration.

How many bolts are included in this kit?

This ARP kit includes 12 header bolts. This quantity is typically sufficient for most common automotive header installations.

ARP

ARP 3/8 x .875 Drilled SS Header Bolt Kit

Name: ARP 3/8 x .875 Drilled SS Header Bolt Kit
Brand: ARP
Price: 60.63 USD
Availability: InStock

$60.63

ARP 400-1104 header bolt kit. Includes 12 stainless steel bolts, 3/8" diameter, .875" length. Meets Prop 65.

Key Features

Stainless steel construction — resists rust and corrosion.
Drilled heads — allows for safety wire installation.
3/8 inch diameter and .875 inch length — common header bolt size.
Includes 12 bolts — enough for most common header applications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more