ARP 154-5403 Main Stud Kit Chrome Moly Steel - 2-Bolt

ARP's 2-bolt main stud kit delivers superior engine block integrity and performance reliability for demanding builds. Engineered to eliminate main cap walk and fretting while protecting engine block threads, these studs provide the foundation for high-performance and racing engines.

Premium Construction:

• Manufactured from 8740 chrome moly steel with heat-treatment to 200,000 psi tensile strength—significantly stronger than Grade 8 hardware
• Proprietary J-form threads rolled after heat-treatment provide 1000% greater strength than cut threads
• Exceeds stringent aerospace specifications for reliability under extreme conditions
• Includes hardened parallel-ground washers and aerospace-quality nuts for complete installation

Performance Advantages Over Bolts:

• More accurate torque readings—studs don't twist into the block, keeping all clamping forces on a single axis
• Reduced stress on engine block threads extends block life, especially critical for aluminum blocks
• Simplified engine assembly with consistent main cap alignment every time
• Professional-grade quality meeting the exacting standards of expert engine builders

When maximum strength and precision matter, ARP main studs are the choice of professional engine builders and serious enthusiasts worldwide.