ARP 203-5409 Main Stud Kit for Toyota Engine - 3.0L I6 B58

The ARP 203-5409 main stud kit provides superior clamping force and durability for the Toyota 3.0L B58B30 inline-six engine found in the 2020+ Toyota Supra. This precision-engineered fastener kit helps eliminate main cap walk and fretting while protecting the threads in your engine block, making it essential for high-performance and forced-induction builds.

Construction and Material:

• Manufactured from premium 8740 chrome moly steel
• Heat-treated in-house to 190,000 psi tensile strength
• Precision J-form threads rolled after heat-treat for exceptional strength
• 12-point design for easier installation and removal

Key Features:

• Studs provide more accurate torque readings compared to bolts since they don't twist during installation
• All clamping forces remain on one axis for consistent loading
• Reduces stress on engine block threads, critical for aluminum blocks
• Includes hardened parallel-ground washers and high-quality nuts
• Easier engine assembly with proper main cap alignment every time

ARP main studs are the preferred choice over factory bolts for serious performance builds. The studs remain stationary during nut tightening and stretch uniformly along one axis, providing much more even and accurate clamping forces. This complete kit includes everything needed for a professional installation on your B58-powered vehicle.