Why use ARP head studs instead of stock bolts?

ARP head studs are made from stronger, heat-treated chromoly steel and provide more consistent clamping force than stock bolts. This helps ensure the head gasket stays sealed, especially if you've increased boost or cylinder pressure.

What makes the 12-point nuts easier to use?

The 12-point design allows you to use a standard socket wrench for tightening. This is helpful in tight engine bays where access can be difficult with 6-point fasteners.

Does this kit come with thread locker?

This kit includes the necessary hardware for installation. ARP recommends using their Ultra-Torque fastener lubricant (sold separately) for proper torque readings and to prevent galling.

ARP

ARP Audi 5-Cylinder 12pt Undercut Head Stud Kit

Name: ARP Audi 5-Cylinder 12pt Undercut Head Stud Kit
Brand: ARP
Price: 175.27 USD
Availability: InStock

$175.27

ARP 12-point head stud kit for Audi 5-cylinder engines. Provides stronger clamping force than stock bolts for better head gasket sealing.

Key Features

12-point fasteners — easier to access and tighten with standard sockets.
ARP 8740 chromoly steel — heat-treated to 200,000 psi tensile strength for a strong hold.
Improved clamping force — helps prevent head gasket failure under increased boost or cylinder pressure.
Includes necessary hardware — everything you need for installation is in the box.

⚠️ 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