Header Bolt Kit - 12pt. 3/8 x .750 UHL (16)

The Header Bolt Kit - 12pt. 3/8 x .750 UHL (16) from ARP is designed for engine builders and mechanics who require reliable fasteners for securing exhaust headers in high-heat and high-vibration environments. This 16-piece kit provides the exact bolt count needed for most V8 and inline engine header applications, streamlining the sourcing process for essential hardware.

Constructed from premium alloy steel, these bolts feature a proprietary Wave-Loc™ surface finish that enhances corrosion resistance and prevents galling during installation. The 12-point head design allows for more even distribution of clamping force compared to traditional 6-point alternatives, which helps to reduce stress concentrations on bolt shoulders and improve joint integrity under thermal stress.

Whether you're working on a street engine, a race build, or a vintage restoration, upgrading to ARP header bolts ensures that your headers remain securely fastened through extreme heat cycles. This kit is ideal for anyone looking to enhance the reliability of their engine assembly, providing optimal thread engagement and preload control when torqued to specification.