Buick Stage II HSK

Buick Stage II HSK is a genuine ARP high-performance fastener (Part #223-4002) supplied for professional engine and drivetrain builds.

Hex Nuts 12-Point Nuts

Key specifications:

• Material: 8740
• Head Style: 12-Point

This component is classified as Head Studs 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.