ARP BMW S63 (V8) ARP2000 12-Point Undercut Head Stud Kit - Polished

Ensure reliable cylinder head sealing on your high-performance BMW S63 4.4L V8 engine with this premium ARP head stud kit. Factory head bolts are engineered as torque-to-yield fasteners, meaning they stretch during installation and cannot be safely reused. This ARP2000 kit replaces those OE bolts with high-strength studs that provide superior clamping force and more accurate torque readings, which is essential for prevents head gasket lifting in high-boost or modified applications.

Each stud is manufactured from ARP2000 alloy, centerless ground for perfect concentricity and heat-treated to a tensile strength of approximately 220,000 psi. These studs feature an undercut design that equalizes the stretch of the fastener, providing a more consistent clamp load over the entire length of the stud. The threads are rolled after heat treatment, resulting in significantly higher fatigue strength compared to studs with cut threads.

• Fits BMW S63 4.4L twin-turbo V8 engines.
• Forged from ARP2000 alloy with 220,000 psi tensile strength.
• Undercut shank design for improved fatigue life and uniform clamping.
• Precision J-form threads rolled after heat treatment for maximum durability.
• Includes 12-point nuts with a polished finish for easy tool engagement in tight head castings.
• Complete with hardened, parallel-ground washers and ARP Ultra-Torque fastener assembly lubricant.