"Buick 350-455 3/8"" SS hex header bolt kit"

"Buick 350-455 3/8"" SS hex header bolt kit" is a genuine ARP high-performance fastener (Part #420-1101) supplied for professional engine and drivetrain builds.

Qty . Size Hex 12-Point Hex 12-Point Hex 12-Point Hex 12-Point

Key specifications:

• Thread Size: 3/8
• Head Style: 12-Point

This component is classified as Buick hardware, suitable for high-performance street builds, track cars, and professional motorsport applications where hardware must withstand elevated loads, high RPM, and repeated assembly cycles.

As an authorised ARP reseller, Billy's Speed Shop sources all ARP fasteners through recognised distribution channels, ensuring you receive authentic hardware with correct markings, packaging, and specifications. We stock these components individually for the UK and European market, providing fast delivery for engine builders and race teams who need reliable fasteners without delay.