What material are these main bolts made from?

These ARP main bolts are made from heat-treated 8740 chromoly steel. This material is chosen for its increased strength and durability compared to standard fasteners.

Why do these bolts have a 12-point head?

The 12-point head design allows for easier access with a socket, especially in tight engine compartments. This can simplify the installation process.

What is the Prop 65 warning about?

The Prop 65 warning indicates that this product contains chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

ARP

ARP BB Ford 390-428 FE Series 12pt main bolt kit

Name: ARP BB Ford 390-428 FE Series 12pt main bolt kit
Brand: ARP
Price: 107.25 USD
Availability: InStock

$107.25

ARP 12-point main bolt kit for Ford 390-428 FE engines. Stronger than stock for better reliability.

Key Features

12-point head design — easier to access with a socket.
Made from heat-treated 8740 chromoly steel — stronger than stock bolts.
Designed for Ford 390, 406, 410, and 428 FE series engines.

This ARP main bolt kit fits Ford 390, 406, 410, and 428 FE series engines.

⚠️ 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