ARP 203-4705 Head Stud Kit - B58 ARP2000 12-Point

The ARP 203-4705 is a high-performance head stud kit engineered specifically for the turbocharged 3.0L B58 inline 6-cylinder engine found in the Toyota GR Supra A90/A91 and various BMW chassis. This complete kit provides the superior clamping force required for high-performance and boosted applications where factory head bolts become a limiting factor.

ARP2000 Material Construction:

Manufactured from ARP2000 alloy steel with a tensile strength of 190,000 PSI, these studs far exceed the capabilities of OEM head bolts. The ARP2000 material is cold-forged to ensure molecular integrity, then heat-treated prior to precision thread rolling and machining. This process creates fasteners that resist stretching and failure even under extreme cylinder pressures and high boost conditions.

Key Features:

• 12-point head design for precise torque application and easier installation
• Black oxide finish for corrosion resistance
• Includes hardened parallel washers for even load distribution and accurate torque readings
• Reusable design allows for multiple engine rebuilds
• Prevents head gasket failure caused by factory bolt stretch
• Sold as a complete kit with all necessary hardware

When increasing power output beyond factory specifications through tuning, turbo upgrades, or forced induction modifications, cylinder pressures can cause the head and block to separate, leading to stretched factory bolts and head gasket failure. ARP head studs provide the additional clamping force necessary to keep your B58 engine sealed and reliable under high-performance conditions.